Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff122d7508bb0155…

MALICIOUS

PDF

72.7 KB Created: 2021-03-27 10:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a30c1a3509b0bbc844ab761e5116d1e3 SHA-1: 56d806afa3b0db9b7f958bde596653e2d3a97920 SHA-256: ff122d7508bb0155c9e47593b9c7536d210115671210e2e83d377a169d2ace9a
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://dafemum.ru/123?utm_term=exultate+justi+in+domino+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448550/normal_60463112373ce.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/Znijjbo/the_wolf_among_us_ep_2_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_600bd67cdb3d3.pdfIn PDF document text
    • http://otshelnik.net/risurisuloparirivumuzuka1am.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_603d3d7c6a880.pdfIn PDF document text
    • http://contarinihome.com/vewukibofaviwilojunubote34lkp.pdfIn PDF document text
    • http://m-laskin.ru/women_s_dress_size_guide_uk77tf0.pdfIn PDF document text
    • http://uspex22.online/juzatalazisawonejarolegsbps4.pdfIn PDF document text
    • http://libralab.digital/wisomhmrft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_605b4d0d117f0.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/SeG0Y04/game_level_designer_salary_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5fd7957e12309.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/ichjgfT/71256961168.pdfIn PDF document text
    • http://goossyy.online/nagiligelihrm.pdfIn PDF document text
    • http://otomail.business/how_tall_is_an_apartment_size_refrigeratori7rhd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5feba164b580a.pdfIn PDF document text
    • http://sedouche.xyz/lilitotifupadelaswjh.pdfIn PDF document text
    • http://outputqwvk.space/money_banking_and_financial_markets_cecchetti_test_bankilarv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_600305b00e803.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/xjhifia/59173575540.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/Ngf4jai/89381417337.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/4ibVDvY/html5_template_generator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 5184 bytes
SHA-256: e30be25ad325f38b3e500a61733138255c2ba6fbb6743e00bfa347331e556cf0
font_01_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 11688 bytes
SHA-256: 75bce1c81c3a2007610a485f01f92bb412ac4d158d1c5ee1ed0c5816682adbcd

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