Malicious PDF — malware analysis report

Static analysis result for SHA-256 80601be84b453fe8…

MALICIOUS

PDF

76.9 KB Created: 2021-09-13 05:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2fa90312ca7b482831003c8a932e40a SHA-1: 95b3cc6a93a1152c3d8bcf649a68ec4889409de9 SHA-256: 80601be84b453fe8f706be0bd951476757b59ba22f486ca6115b29e556e24e23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The `wkhtmltopdf` authoring application suggests it may have been generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=dhanush+songs+download+mp4 PDF link annotation
    • http://fine-cottage.ru/userfiles/files/70855405803.pdfIn PDF document text
    • http://asvpp.fr/pdf/movedo.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/wipuz.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/71777922967.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/fiwofugabu.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/30296261270.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/54909467821.pdfIn PDF document text
    • http://watch62.ru/files/files/ditepabidirolavoliladila.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/jesoropogunus.pdfIn PDF document text
    • https://fultoys.com/userfiles/56698338132.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/34944843529.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/korafotuxafa.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/17412872583.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/78661262435.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/88060476099.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/7066916863.pdfIn PDF document text
    • http://grimastone.ru/files/kiril.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/pq3ndf4rh3clli6m9aaiougnb5/rivot.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109111800517370.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/buxukumib.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/rivixetidipopufinoxixusi.pdfIn PDF document text
    • http://haitrungkim.vn/uploads/userfiles/file/xogaginojexanepew.pdfIn PDF document text
    • https://tpk-m.ru/files/file/jofubemorofor.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/66616961257.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_off0000c7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F9 17608 bytes
SHA-256: 478ebe248ccc930beb1712b495f42ec60b441bb7cde3abdde7dc961c86251b68
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 10684 bytes
SHA-256: 9f6f1a348564337da1d047916073d356fbc7dd09e18dccdf226741b69ffdf068

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