Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e2aa25f072a766…

MALICIOUS

PDF

67.2 KB Created: 2021-09-25 08:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: defac9c3468c1f0a864c1a214bf1f5a7 SHA-1: d18f1bd399a81a6abb109335b26767c953f2458c SHA-256: e8e2aa25f072a76676b21e0f28189cf14b406757423424b847a0fd0552fa8fb7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The document also features a link farm pointing to compromised WordPress upload storage and other external URLs, suggesting an attempt to redirect users to malicious sites or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=arjun+patiala+full+movie+watch+online+filmywap PDF link annotation
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161484d04af3a7---jomolotefagovekalumomoleg.pdfIn PDF document text
    • https://aedwea.com/upload/foto/pitaxolarerenovevujofewi.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/62426758480.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/womuxowisegota.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429d3bdfbeb---xesik.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426673af324---79960474665.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/gikorusi.pdfIn PDF document text
    • https://funstore.dialog.org/userfiles/file/7479310395.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/33081554311.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/divotuxukevu.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/logitugajorekidozo.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/tubij.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/68968115970.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/bb556a977b7b64e4303a0f09d7b78fbc/jilufuvotojibe.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/25858053564.pdfIn PDF document text
    • http://talesma.com/E/file/98066250499.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_off0000a636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA636 14888 bytes
SHA-256: 7457c0cdb3fbd98277741ecd9cf9953e2be1adb2f32aba5a25bf020eec6d03f8
font_01_sfnt_off0000cbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDA 11052 bytes
SHA-256: d81c21deb42db436f4c8ed9e8c972ec34b1367157b967ede2857253bef3afdb9
font_02_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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