Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1bb1c3de321724…

MALICIOUS

PDF

87.9 KB Created: 2021-02-28 21:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a678912d176e651368d872948c48fe46 SHA-1: 4cf5d744685dbb8717f7a6fbacda05c091f179a2 SHA-256: 2b1bb1c3de3217246c693b8967af8fc770220c48ebba3a36116e2a6b343c06f6
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious websites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/strik?utm_term=how+will+you+measure+your+life+christensen+pdf PDF link annotation
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/3499283.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/vosigugolebode-zefigilanevoviw-fufope-lagezarabi.pdfIn PDF document text
    • https://refotazobig.weebly.com/uploads/1/3/0/9/130969241/3035138.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/9968866.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/masomozulepiri_xuvewowaj_tosutesuvevep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fe901b7a4e2a.pdfIn PDF document text
    • http://jerijoba.iblogger.org/bunty_punjabi_cartoon.pdfIn PDF document text
    • http://wivadanege.iblogger.org/viper_4115v_remote_start_installation_guide.pdfIn PDF document text
    • http://businesshelpservice.com/posadujipafefukebazowuk0j7u7.pdfIn PDF document text
    • http://kungfumalibu.com/ata_chapter_56rxo1s.pdfIn PDF document text
    • http://cyberlife.store/rurudakoxosukixkq9xl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_60168bd036899.pdfIn PDF document text
    • http://filmera.ru/mu_n_xin_thi_gi_chc_v_b_thwn4tf.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/4221043.pdfIn PDF document text
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/3b45ce761e.pdfIn PDF document text
    • http://pogadai.xyz/xajiniromonapedokizogutazenm3h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fce5ab0d7ab1.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/pifim_gofezaxoso_bitufetenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejofinudagiji.epizy.com/xadikasakarewugenesovel.pdfIn PDF document text
    • http://gisonebabi.epizy.com/63861530151.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_off000118ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AC 5552 bytes
SHA-256: a7c86ac4b6afe18017ccf26fd6287dc647c2b2ae9b46633ad73b40369f83a0f7
font_01_sfnt_off00012b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B73 12136 bytes
SHA-256: a12cb0fba5d6eee6cbb305ca2d27847213ece1539925941b0df42a9c917908a1

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