Malicious PDF — malware analysis report

Static analysis result for SHA-256 865d7932c9a0d407…

MALICIOUS

PDF

74.6 KB Created: 2021-04-05 04:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3201eb5eb1293cf05f8b4820a9522982 SHA-1: 7c0acc1439066c73c38dc6f189715c590f7422d6 SHA-256: 865d7932c9a0d40793124c137902d7c47e6f783989ff58b8ac4babda6cd2fa4e
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs and the structure of the PDF point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=what+type+of+coolant+for+2014+ford+focus PDF link annotation
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/mixolad_buxapemefisage.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/3fa4aae5daa.pdfIn PDF document text
    • https://mirebaxowani.weebly.com/uploads/1/3/4/0/134017623/fibivona.pdfIn PDF document text
    • https://cdn.sqhk.co/suxejatove/fii61Jk/xufedipalubirerijulopaba.pdfIn PDF document text
    • https://nuralizowipu.weebly.com/uploads/1/3/4/6/134693001/jogopemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458852/normal_605424a7740c7.pdfIn PDF document text
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/3437703.pdfIn PDF document text
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/nekawite.pdfIn PDF document text
    • https://xixafaxuxux.weebly.com/uploads/1/3/4/3/134340403/tikokifaneb.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/e8ee75f909120.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/ahjgfih/elite_dangerous_parents_guide.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/bc3ad.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/e6ed4b724db.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/jKX36Ie/gajolefogisunodosumatu.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/EjaNjjb/10626921884.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/magixaponupedasuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_60539558803a3.pdfIn PDF document text
    • https://vujufosidomo.weebly.com/uploads/1/3/1/4/131482916/7895059.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/tuxenipup/42223391213.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/what_does_a_mental_health_coach_do.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/xojed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 5772 bytes
SHA-256: 14aa4632c18fde4cc491eed7609991a21dfd4917b66fd06f4e16d8f3baabbd9d
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 11612 bytes
SHA-256: 53b5802a4a4d7f8b32bf89c0bb7b201e73059c84687f16d25538fadd6fff6f1d

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