Malicious PDF — malware analysis report

Static analysis result for SHA-256 305de42f38fc3fff…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 09:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35fc78b03f3a4ae2462c9577d85610de SHA-1: 5604cf2569fca06bd700b8d0af0279ceaf748c98 SHA-256: 305de42f38fc3fff739bd08df8754b3720a758a2f51b5966cba6b803f4c4040e
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 0.9993

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://vilenefex.ru/123?utm_term=clash+royale++pc+play+store PDF link annotation
    • https://cdn.sqhk.co/dutebosatu/REzxnaK/16734252348.pdfIn PDF document text
    • https://zalorapowil.weebly.com/uploads/1/3/1/8/131871687/pizajinaboxape_tiguxixirarabu_xapiloleke_sudagumazup.pdfIn PDF document text
    • https://bivedaniliged.weebly.com/uploads/1/3/4/7/134732971/jedud.pdfIn PDF document text
    • https://xukujeferok.weebly.com/uploads/1/3/4/4/134435440/467677.pdfIn PDF document text
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/6296b595876.pdfIn PDF document text
    • http://bamupiwabibajew.mywebcommunity.org/77410450789.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/jixalajoviwudotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_6024911a41ce6.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/8450889.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/dolby_atom_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/laloropaki/a0gfCdI/jitufopa.pdfIn PDF document text
    • http://wuvozikeximufuk.iblogger.org/nemasew.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/treatment_of_cavernous_sinus_thrombosis.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/jupefubekopigurufojovex.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/OietjfF/fukukekenusufuxuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_604a74ab16407.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/ighfrhb/3495339300.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/nCcSzih/950288125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banudozege.epizy.com/abdomen_agudo_quirurgico_schwartz.pdfIn PDF document text
    • http://xejobutek.onlinewebshop.net/16865522070.pdfIn PDF document text
    • http://movuzawizigevej.myartsonline.com/27891341934.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/aide_memoire_electricite.pdfIn PDF document text
    • http://relabajegeb.rf.gd/fosirubed.pdfIn PDF document text
    • http://kavolimuteso.epizy.com/template_calendar_2019_malaysia.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_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 5028 bytes
SHA-256: 8b832a301573d2ce92a4be5bbf985446f6939279d5f88932f686a05843a2185c
font_01_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 10784 bytes
SHA-256: 0eda1d6696ab79f4e58958f0fc82cca9536094c7dd03de52c0dba0f467538b7e

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