Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c7cce4c3cdddc9…

MALICIOUS

PDF

78.1 KB Created: 2021-03-27 09:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c54c9c204c149ac59ef929ac7408ef4d SHA-1: 154b0bc5a07422c2b1defe36e92e7849b7ddc5a5 SHA-256: 46c7cce4c3cdddc924551aaa1852c587096c070ac69c4143b677c4ed5765d819
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/wix?keyword=state+inspection+manual+virginia PDF link annotation
    • http://iciapp.xyz/4600143633drmsj.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/wojalirakotepaduzixulir97nnj.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/fulapexube_tapebavusijit_setabutus_ginow.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/veselep.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/definicion_de_biometria_hematica.pdfIn PDF document text
    • http://you-bestshop.xyz/buxowozukiburotehpsxw.pdfIn PDF document text
    • https://ruzejome.weebly.com/uploads/1/3/2/6/132681971/raperenuvule.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/6472319.pdfIn PDF document text
    • http://lovepositions.info/what_is_factor_theorem_definition4iuf9.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/govitijusaxa.pdfIn PDF document text
    • http://onlinetiser.website/nowoladipa3vp5.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/25088766240.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/89251082261.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/tifirenosijisepabom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_47f9bbc838ca4fc8bd14859cf1af1b90.pdf?index=trueIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_a0e7cd46185048cc9810b6fe20e603a6.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_31a89c3f0a3549b59516f8a3244eb922.pdf?index=trueIn PDF document text
    • http://purewowesajumu.myartsonline.com/13648383084.pdfIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_e88cb9047111405bbb7cc6ac4f1e2f4e.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 5416 bytes
SHA-256: d6204237b7f762cc20ceef86a13bd8cbea3b5072d4cc10d0264a614f711f1e7e
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 11704 bytes
SHA-256: 71f2712a5df50ae954df477de8eef803fd6774b335bc9269ce5b5014c112b58b