Malicious PDF — malware analysis report

Static analysis result for SHA-256 986ccd34ca589a08…

MALICIOUS

PDF

89.1 KB Created: 2021-02-23 00:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 17ef1dc28040ba3fdcf24240a767f571 SHA-1: 84427345c2886fb64f5b83cc026d15cc02998a1d SHA-256: 986ccd34ca589a08dbd58b7f333f31fea1022a9129d6134e2c59498a93e12132
194 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=get+musically+fans+without+human+verification', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=get+musically+fans+without+human+verification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412591/normal_5feafd5de605a.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/hcgiqgc/19904947012.pdfIn PDF document text
    • https://cdn.sqhk.co/kawaniroti/fhiy9he/world_war_2_airplane_propeller_for_sale.pdfIn PDF document text
    • http://czecheducation.space/84020644581zlur2.pdfIn PDF document text
    • https://joriwonakogilul.weebly.com/uploads/1/3/5/3/135305945/9927862.pdfIn PDF document text
    • https://xorizugabe.weebly.com/uploads/1/3/1/3/131398100/lazuxawel.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/hVxjiJT/elements_financial_mortgage_rates.pdfIn PDF document text
    • http://douchehub.xyz/audi_r8_v10_plus_performance_upgradesbfgas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fd22ca8877ed.pdfIn PDF document text
    • http://biggymstoe.com/ponimosapuxusatuzaponet0c.pdfIn PDF document text
    • https://felojabok.weebly.com/uploads/1/3/0/7/130739263/7540320.pdfIn PDF document text
    • http://sacredname.ru/blacksad_sketch_files7gc2k.pdfIn PDF document text
    • http://reform-st.ru/fizumamavi3t8dy.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/hhhgeRO/bloody_roads_california_cheats_apk.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://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_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 5288 bytes
SHA-256: a88b9f69d733b117e6b0635370d923b5187df44219568ed771eb0b52d0e3dff1
font_01_sfnt_off000123cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 10916 bytes
SHA-256: 50aa3a33765c33256f69b8c3b5a847d1e10c9b093170ffc8a1a2b3ec421654a5
font_02_sfnt_off00014904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14904 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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