Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f6ab26bba4b061…

MALICIOUS

PDF

80.2 KB Created: 2021-09-22 23:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3bebc2b4ae94b374ce6c52498b2380df SHA-1: 61ea475dac449baa29bed6f1dc6da004dff1aac5 SHA-256: e2f6ab26bba4b061f1f1126773b4652f589b3c5cb341021f8b03d7e11511d909
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, several of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://sanga.asia/userData/board/file/nafusafabitiziwodaval.pdf In PDF document text
    • https://arbormaster.net/uploads/files/44798669002.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-6/20210906161224621942.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/66579468805.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/751e476b6bfd35ded2fdd937bbf65c94/75189133354.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/10777797747.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210916225656.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/5127138634.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/rukuwapulevukuvisuvir.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/zupiz.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/soxaref.pdfIn PDF document text
    • http://pedraferro.com/files/files/3917755328.pdfIn PDF document text
    • http://hkalc.com/userfiles/pezamexugegaseve.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/vuwogugowok.pdfIn PDF document text
    • https://gadapavimenti.com/GadaFiles/file/nevamivizelodaladarun.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/805484667.pdfIn PDF document text
    • http://usmleworkout.com/files/file/53398678604.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/6287774767.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a909d0c5e---60123511923.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/26137623526.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142eca5e9d0e---51494963674.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=free+ebook+downloader+apkPDF link annotation
    • 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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 10324 bytes
SHA-256: 8d634b2154e72ffa6043eb38ef480cab8c0bff3ec71ccd5a94188d6d6900bc5d
font_01_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 17568 bytes
SHA-256: b2569e71e0d9bc66b29a732dfb30cb91a3787cf71a9a66246941f64746957693