Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bbc29718cff1a0…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 18:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5d5360229f856b62b4a6ad8f7592586c SHA-1: f2371a60f3d28ecd83d487e62af282184e2b21b0 SHA-256: 48bbc29718cff1a04cf42140315f0a6d968d63b8eeeb297ec3b92ce11eccce84
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 of which point to disposable domains, suggesting a link farm designed to distribute malicious content or conduct phishing. The document's body text, though partially corrupted, indicates it is disguised as educational material. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=finding+area+and+perimeter+worksheets+5th+grade PDF link annotation
    • http://mybiol.site/software_project_management_plan_spmpvye41.pdfIn PDF document text
    • http://swiss-family.space/olympus_om-d_e-m1_mark_iii_manualt2ybd.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/vampire_diaries_season_1_episode_22_song_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fe53ad03c886.pdfIn PDF document text
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/nubiforuwuvadipawuja.pdfIn PDF document text
    • https://fizabawizusor.weebly.com/uploads/1/3/4/0/134000364/zojozubukisem.pdfIn PDF document text
    • http://siankaanmexico.com/xufegulokoginefidabizoy9asy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_600365ab689a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464297/normal_5ff5a429cb53c.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/59815815921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_60226c18527de.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/notiremoxupuvu.pdfIn PDF document text
    • http://bioforce-co.site/govamowcj0oa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fdbe489afbab.pdfIn PDF document text
    • http://totalcreditreport.info/mezivoborozolizubisileb671k.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/d9e89532d2f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5ff29ab83ed69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_172b638319024c92a7bf87884da26edd.pdf?index=trueIn PDF document text
    • http://zizenatoxu.myartsonline.com/77744979730.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_d2445d1c4a7f4803848bec443f06c59e.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_d5a9ba5f964b4bb6b7e105a07f0691ec.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_4a9808705f724443b6e14a38981130ab.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5576 bytes
SHA-256: 2755f30dae5872b661e4887a004c945a7f47b2b7f0c78fbdaed880d7e65e3563
font_01_sfnt_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 11336 bytes
SHA-256: 9c9b5b2bae7763d332d8c0260e9f874c7c0caf96189f35d25ea9cecfa9cafb58
font_02_sfnt_off0001299f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 16144 bytes
SHA-256: a0532d1212509dae036733b1fb6f303b0d7fd7a209d3928fdad713008da19d30

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