Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cace956dce7a6d…

MALICIOUS

PDF

82.0 KB Created: 2021-06-13 17:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e93fdfcd7d469847cc040ffba3ce33e SHA-1: e80d0c2dd6c1efd9e053758c147b8fb4f267f336 SHA-256: 17cace956dce7a6d606fcb62d74c45788ff373dfe488f00b130a6e78946e5c25
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 0.9990

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://synerhu.ru/pbw?utm_term=swami+vivekananda+karma+yoga+book+pdf PDF link annotation
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/fomuvawuzenigus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_604a2e119e407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462344/normal_5ff3a96485a24.pdfIn PDF document text
    • https://mumojugaweweran.weebly.com/uploads/1/3/1/0/131070520/f2d64064f1d740a.pdfIn PDF document text
    • https://zopamege.weebly.com/uploads/1/3/5/9/135966764/56ba520200c2ac8.pdfIn PDF document text
    • https://nigipesifagezeb.weebly.com/uploads/1/3/1/4/131411762/wosogibi_zemigufulano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_603a4f080ee80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_6037ea8173925.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448332/normal_60affdc5b0131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423145/normal_606923f7612c2.pdfIn PDF document text
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/eb506000adbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474446/normal_604b7978178eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6045e905caef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_6009ec688b3a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fc9312f130b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_60274adb4ae2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60256df3c1d97.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/9917473471.pdfIn PDF document text
    • https://mobasukirogejus.weebly.com/uploads/1/3/1/4/131453019/zigatawad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kedetuwi.pbworks.com/f/54572946258.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/how_long_does_it_take_to_charge_aegis_legend.pdfIn PDF document text
    • http://tefimemovem.pbworks.com/w/file/fetch/144661179/98546084683.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144427872/53580350425.pdfIn PDF document text
    • http://zevatirupura.pbworks.com/w/file/fetch/144626520/wozadekosalekajepabuduso.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 5420 bytes
SHA-256: 1281c898d7109d58264e20d58b7c4f630481ec4f8985b30cfe0bee62f5bfb44d
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 12412 bytes
SHA-256: 891efb10961496b40d0392ea0711d60616268218fe1b3974a841db39fa758483
font_02_sfnt_off00012bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176