Malicious PDF — malware analysis report

Static analysis result for SHA-256 88112c8635aede97…

MALICIOUS

PDF

127.4 KB Created: 2021-05-08 01:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 74283da3a9d022258c0612362b4b3e9b SHA-1: 81071aad01bc4e69be26f7edd063f50e916f06a4 SHA-256: 88112c8635aede97253fb465ed6944f74561c7543e278d54f321d6189298cbfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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.
  • 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/strik?utm_term=constellation+map+orion PDF link annotation
    • https://cdn.sqhk.co/medugagoviji/dPJSSji/red_balloon_toy_shop_west_kirby.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/Rbbohh7/27586704455.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/gf9c8pv/butoxigavudalexijuj.pdfIn PDF document text
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/5c4a7752.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/jigiidY/bloody_bastards_apk.pdfIn PDF document text
    • http://esclick.pro/who_does_alina_end_up_with_in_run_and_rising6poky.pdfIn PDF document text
    • http://stickerrus.ru/french_accordion_musicwdfc6.pdfIn PDF document text
    • https://joguwezur.weebly.com/uploads/1/3/4/5/134500750/mupebeti-gewifejusodi-supireviwusif.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/1C2JVYf/61826715463.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/ificjgD/batelenal.pdfIn PDF document text
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/759c66848f6fda.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/Zheveje/41401849146.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/jivagajamav/dibetivakevupunu.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/fuwumakubumaxeno.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/70829818132.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/vending_machine_business_proposal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/14115422463.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/97244625419.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/rebevebovigofegarije.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/casio_fx_82es_plus_manual_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/antonyms_list_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/88647548479.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_off0001b7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7A8 4868 bytes
SHA-256: 4b97e3e40d93257bed98ceca852193c49711f0850a86c86f1efdad462c81beae
font_01_sfnt_off0001c818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C818 11816 bytes
SHA-256: 6c8c9c34356e4aff9a73811b48da2252a1177d87b2f5170469a48e866e1a03c7

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