Malicious PDF — malware analysis report

Static analysis result for SHA-256 f076631b4c6b2bd1…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 05:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d7f57386bd24956dfb5e877b8f868af8 SHA-1: 5a98b333725b512e1202f2db69be625418d791df SHA-256: f076631b4c6b2bd1fdaf433f862e1c94ba56c3031a9d5081964f4ada8ae05004
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 0.9997

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://maypoin.ru/award?keyword=autumn+leaves+guitar+solo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459329/normal_5fd6e577b3066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_604a4b45b8fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_601ffe72aaf13.pdfIn PDF document text
    • http://belplitka.ru/libros_de_minimalismo_gratisvq9oa.pdfIn PDF document text
    • http://prizinsta365.site/sauder_computer_desk_with_hutch_assembly_instructionsr3zc5.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/AB6hjuE/kefafileje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_603fa72a4d517.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/avery_weigh_tronix_zk830_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_604edf2fe10f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_6023ff04184fc.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/cifiiD3/jeneniniwitisabujonapez.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/occupational_respiratory_diseases.pdfIn PDF document text
    • http://bristol-yalta.run/lexupagekimosisavoxbbh9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_5fe10907eb9fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paguxesij.myartsonline.com/vexateroraxirodajafiriz.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_to_start_a_powermate_3000_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7679624-e2c5-4271-a791-9024b3e5ccac/japanese_cookbook_and_how_to_raise_wolves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6956f3af-17ce-4c43-99bc-13714e83fede/22195777107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78045d87-e61a-4845-8b2b-c0d51834e4d6/william_wilson_edgar_allan_poe_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8fa80b-35b1-4e8e-85b7-2c4d71b4d176/30032167135.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 5412 bytes
SHA-256: 4e494bf4046dd9999f6671e7587846ee12148b5f76906cefb159c20e58a28cd9
font_01_sfnt_off000104df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 3020 bytes
SHA-256: e43126e768bed0c6760af5bf915d28e86850215952467f34315c079a96f53be6
font_02_sfnt_off0001111a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 11064 bytes
SHA-256: c300669fd671a4ab660325acc3fc9fcfc800021d27c08c9f222597cb74070628

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