Malicious PDF — malware analysis report

Static analysis result for SHA-256 f769b36f8076328e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 00:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1c600f02876e9ccc5c9dd23d21894410 SHA-1: 118d2e86d881029c8f87bb9664bd053d4f7aacc3 SHA-256: f769b36f8076328e85856af25df6765f132421a99d34b29803b3f9204aa98fb1
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 0.9998

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://fokemale.ru/wix?keyword=static+image+gif PDF link annotation
    • http://mmeueue.space/manuxeritipojdqsw.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/venn_diagram_exam_questions.pdfIn PDF document text
    • http://dress-russia.ru/digirilunaretikurorigogngro.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/8854091695.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/8165773860.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/autoimmune_thyroid_disorders.pdfIn PDF document text
    • http://draiwenstore.online/story_of_your_life_lyrics_matthew_westr85os.pdfIn PDF document text
    • http://fruct.space/what_are_the_features_of_arduinop70qx.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/raromaxobabipojanakule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/sukepuzubexawumi.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/xosofan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1857fc81-3a09-427e-b128-cdd0adde0a4e/39653232211.pdfIn PDF document text
    • http://newepizudef.atwebpages.com/jawijopo.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/kawiniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e86843-6f1c-4c69-84f1-7bbbf9cd47e2/kudoduzigojuvifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6b5a3d-4626-41c6-88a4-9828cf4d0c76/presto_dehydrator_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9fb8b0-7106-4424-86bf-4586319dc3c0/10788136918.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/konemuwivepumadibuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/leadership_soft_skills.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 4996 bytes
SHA-256: 9c77dc1a25a1ef399a22661f9c85e50b50fd290f04ce00673914bdaeec19ba2c
font_01_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 12044 bytes
SHA-256: cb7db124dc259d5fb84868e6e5621e7d75d0ecc83cb73d1e59fbc9b0851ab14a

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