Malicious PDF — malware analysis report

Static analysis result for SHA-256 5546273fff1d44e9…

MALICIOUS

PDF

86.1 KB Created: 2021-04-03 09:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ffe57b2e948a88ad47bfd7398513d98a SHA-1: 91bb68c62b967ee696e6dcaa26740d36cde8ae36 SHA-256: 5546273fff1d44e9699d557d05fdcd6f6112189e36551d224c7dde1746e65ca6
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 0.9997

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=management+information+systems+degree+plan PDF link annotation
    • http://baramijotafexo.mypressonline.com/acta_constitutiva_que_es.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_6016d77df0ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_60624a34022e3.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/gg6oyib/61784348536.pdfIn PDF document text
    • https://rebigakudaj.weebly.com/uploads/1/3/1/3/131383708/zugefuwoparuzude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_602e1d1ed265f.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/jdTxjjD/93028175200.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/giAyQAx/subway_surf_run_3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419827/normal_6003dcc06d1f0.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/advanced_network_analysis_techniques.pdfIn PDF document text
    • http://melowimaz.getenjoyment.net/encphalite_auto_immune.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/9821040.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/4f32cdf36.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/vixopinakojakunufabi.pdfIn PDF document text
    • https://dewasujule.weebly.com/uploads/1/3/4/3/134340999/kedixaruveref.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/24208054922.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/micoqge/jumpers_for_goalposts_66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girofili.myartsonline.com/dujotilanomuwekitemumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a59106-49ee-4338-93c9-49298425dee6/94806505539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb95a4b-2e4a-49e9-bada-680a81355e38/how_to_use_google_workspace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7487e-0b8d-461c-9021-e1dd6478d11a/harley-davidson_livewire_battery_specifications.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_off000113a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 5468 bytes
SHA-256: d5907e5194b0b1332635f9180815ebd3b5755d8627ef143be3c93fd335359141
font_01_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 10828 bytes
SHA-256: e1d1bb0c73d9361a46e26f2f7f199a5e3b8317f2765862f909d1ef262b714611

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