Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b501f714e3c461a…

MALICIOUS

PDF

84.7 KB Created: 2021-02-02 08:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6a440344324353dd90c42f0288c42fd8 SHA-1: 95f1a52672f3e83448706b7d91f2e25af0532417 SHA-256: 7b501f714e3c461a706ee5a23210f018a5acc526505cf7183bd9aad48bf82c5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

Heuristics 5

  • 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 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://seumenha.ru/aws?utm_term=assamese+new+status PDF link annotation
    • http://all-gopro.com/kakenekobikokegilrdye.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/lgfjbhd/62209809911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5ff27d1169419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420748/normal_5fecce5defade.pdfIn PDF document text
    • http://xivitej.66ghz.com/nuneletikovun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_6011d300008a5.pdfIn PDF document text
    • http://svarka-aurora.online/vubewid9vq.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/gje5jgR/reseg.pdfIn PDF document text
    • http://picsonair.com/bamonisusaxelawb7q3x.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/gcNigjg/bexugazenuvosilenuxoju.pdfIn PDF document text
    • http://luminar4-download.xyz/jepizunotujinfet2.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/87iwfdc/re_2_ada_walkthrough.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fccdaedb4592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://silapopo.epizy.com/27195279489.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/substation_automation_system_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/60100551655.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 4784 bytes
SHA-256: 3f1dfd0e11f0cfa75d12d88309dec6088cbf8fe7229dde03bdf91dd5b8679374
font_01_sfnt_off0000eb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 9912 bytes
SHA-256: 87bd11f7bad32b58cb1da2a361ee7e5b2fcf228e9a702f4655c66f20844c2fb3
font_02_sfnt_off00010b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 10552 bytes
SHA-256: 7d0473bb3decab902a5cade80e7db37656516bf46838eb925b19859467058731
font_03_sfnt_off00012f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 16320 bytes
SHA-256: b481ec1fb424b50e3e8a468c46fad8fa5dc5e4c3a94cfc546f3744995a0bba12

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