Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2413fdabb9e7ca…

MALICIOUS

PDF

84.9 KB Created: 2021-03-17 18:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7259ea1f7826aaa1c078e3fd73b9efb6 SHA-1: 17f019914957cb5cafe7d5307f8ba1dd4aac61e1 SHA-256: ab2413fdabb9e7caff5a42f6c6ec0bf7a420bf865fde27c5623b748cbe853f37
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a common search query, likely to entice clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=how+do+you+charge+jlab+wireless+headphones PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451545/normal_5fee66cbcba12.pdfIn PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/wuditewowemanil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_600dff6c432c1.pdfIn PDF document text
    • http://vowebipuse.22web.org/html5_video_background_template_free.pdfIn PDF document text
    • https://gatikewud.weebly.com/uploads/1/3/4/3/134382011/xijim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fe961e0de4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_604cf2c55df7a.pdfIn PDF document text
    • http://wovolutoxali.iblogger.org/bmw_manual_car_sales_melbourne.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/2c7428452bb.pdfIn PDF document text
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/51f9ef0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_86c27a4255e24cc599d3fa1ea959ea0f.pdf?index=trueIn PDF document text
    • http://newubopuga.epizy.com/dugagosupobati.pdfIn PDF document text
    • http://vosimamasi.epizy.com/metformin_and_alcohol_nhs.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_d972e8ff366d483b9184b5b4f27737fa.pdf?index=trueIn PDF document text
    • http://wepatimaleb.epizy.com/85588298744.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_2c9ca8d36b014ebba5b9e0a59e9f85d2.pdf?index=trueIn PDF document text
    • http://vikipabolukizi.rf.gd/rafevesoguv.pdfIn PDF document text
    • http://rasunafosav.epizy.com/34533358760.pdfIn PDF document text
    • http://kepinud.rf.gd/vpnbook_password_apk.pdfIn PDF document text
    • http://wajifinome.epizy.com/12324031295.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_e298e6a839754e7891537f17dbdc9507.pdf?index=trueIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_59944c42cdcc4b898271231ae61de5b0.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_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 5704 bytes
SHA-256: 03ae6a98d9983f0848776f99688ff4d745edd3fb3489682db7d82fb5cfdc4a9f
font_01_sfnt_off00012151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12151 10796 bytes
SHA-256: d76032f49f9485ac82aa08d1ff752e88c67dea8b1bcf0ef406d60e217097ece4