Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acb07543eada175…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 07:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 97bc09cfa217ba7c5f27b26859c41e3b SHA-1: 7b6759f20920396cdd1e04c77dd4e95b644230a4 SHA-256: 7acb07543eada1750ab8a7fafedd38801f5f0c6a68055a90c1d04382fc2cb467
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/award?keyword=bilinear+transformation+examples+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422133/normal_6008d1800a8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_6016f54c5b020.pdfIn PDF document text
    • https://giberala.weebly.com/uploads/1/3/5/3/135306284/8d733.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/jepusazopedobesini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601adffea4de5.pdfIn PDF document text
    • http://nominasacra.ru/3560565361376f9h.pdfIn PDF document text
    • https://mobesometug.weebly.com/uploads/1/3/4/6/134644263/3032327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_5fd8b04b07e48.pdfIn PDF document text
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/menunudul.pdfIn PDF document text
    • https://liruviwogaralo.weebly.com/uploads/1/3/0/7/130776788/fameletesosax.pdfIn PDF document text
    • http://drive4mclaneaustell.com/59880356474vgk9a.pdfIn PDF document text
    • http://lexulepi.22web.org/dinunamegoreserekotigiwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_ae0fd0ec6676481eafd326df726cc494.pdf?index=trueIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_f507d208163d4ecc8379f74cde0f7e00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bf5a88-89ee-418c-a92e-31aa76d5ffec/25197895282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed52e92-3a9e-4de8-928b-a2fee9f0b238/zakojibapuvewa.pdfIn PDF document text
    • http://baverasoge.epizy.com/ginopujosemijixejapuve.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_f70f6d9e7c5140c8816d579b5803758b.pdf?index=trueIn PDF document text
    • http://xijaxatob.epizy.com/semi_structured_interview_guide_example.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_a141748cdf15412488e0d140b52026f5.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_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 5304 bytes
SHA-256: c05834d892345def4e992cd981f8b4c4aec66e5f9a0e8b0562c87b96d21aee63
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 10652 bytes
SHA-256: a54164f3419b9ec85bdc1da1b41907c2b7e9a63f2180216287c6f2723db62295

Open this report in the interactive analyzer, or submit your own file for analysis.