Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb4700fd0260dde…

MALICIOUS

PDF

86.8 KB Created: 2021-09-19 00:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 262c5ea098ff405c0d38a77c484091fd SHA-1: 0a581c490b7858f15bfab815ddc1b23957e03812 SHA-256: fcb4700fd0260dde912c7d1f6027e5b60d7915991be2791643c2eb09086cc21d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used for phishing or malware distribution. The presence of a visual download button further supports a lure-based attack pattern, likely involving the execution of embedded JavaScript to facilitate payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9839

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=filmyfy+apk+latest+version+download PDF link annotation
    • https://allmassage.net/upload/file/20210910151949.pdfIn PDF document text
    • http://raczcsalad.hu/files/pimanin.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132323c7395f---90667240855.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/radep.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613245817dc0c---vawun.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/lokusajisakazigerugije.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1c80669de33b64c7133a39075ff358c5/sadumudikaveso.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea8086f6a452708049b18049f8241947/gekozi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343239cb5e2---rutokokedazi.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/0b89d50ecb1a279c8d0f07f3a4259c09/48266136086.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/tumadunobiwedomu.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/zipodefepifewagarasir.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/jujizigizutemiwitos.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144846780cd6---nonejerexikuderesiminodat.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4c68905a7e82f16005c6a5098daed31e/xujojonawaris.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/77629413147.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/gagexidifesirudedivisal.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/82a0fb0e0dadd10ffcfca2bc44eaf1dc/jepemifazoda.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/bazan.pdfIn PDF document text
    • http://le383.com/uploads/files/xulimanarakimaj.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317c4b20095---95128570642.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/duzoz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321d4c24e4b---62930062884.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134bcc1c4e38---mutokutamujimawal.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415a4430c61---18973603980.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/98629726756.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 19348 bytes
SHA-256: bc62e351ac5addf3d89057064e6af9ed8d3a2b0dd3c78e54d21116873d288c4e
font_01_sfnt_off00011be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F7 10996 bytes
SHA-256: 83fed6dc7bba2b336230bbfed7fd884b75c8ba98d745ad1449907ca0585b11a0

Open this report in the interactive analyzer, or submit your own file for analysis.