Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a1ef3547ba2756…

MALICIOUS

PDF

72.3 KB Created: 2021-04-28 09:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab96985fd180d75c6e6ab02225434422 SHA-1: 751bc97d74a8cb327c2fed43f4067c0f320d65c9 SHA-256: 46a1ef3547ba2756e88137d3873631bfa88f64b20daea308445c65597a2ccaec
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://botokaw.ru/strik?utm_term=how+do+you+pair+a+logitech+wireless+keyboard PDF link annotation
    • https://cdn.sqhk.co/tiviluluje/tgggeGd/combining_like_terms_pyramid_style_answer_key.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/all_types_of_cancer_and_symptoms.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/wejosinolurotufakok.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/a1tAQhg/bladen_county_gis_data.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_60164ebe8b292.pdfIn PDF document text
    • http://nugowimabu.mywebcommunity.org/integral_calculus_all_formulas.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/cant_find_cursor_on_lenovo_laptop.pdfIn PDF document text
    • http://raisinsapp.club/tukixusajirebussny.pdfIn PDF document text
    • http://theplafond.xyz/vitaduwby3h9.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/csXpjbR/modikexuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/ifuSicP/frases_de_sad_girl_tumblr.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/12972917192.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/dibjaie/majila.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/grade_3_maths_addition_worksheets.pdfIn PDF document text
    • http://pshcomonhere.xyz/sodastream_one_touch_white9nsry.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/traditional_chinese_english_dictionary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_60384608c2161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_cc4b8542c7934eada4e93786070742e7.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_4adce4d6ca194e7b85de040893758aec.pdf?index=trueIn 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_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 5692 bytes
SHA-256: 7fe8e0c0a99b630372ac608c4106d5b3ae74ec591836f06657c825dfa1e38916
font_01_sfnt_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 10656 bytes
SHA-256: 2e1c8fd4c07436213f923f475542a199ce0ae0f733018ce8dbdc2d7ecf67ea5c

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