Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20f312930ee7308…

MALICIOUS

PDF

77.4 KB Created: 2021-04-12 04:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f0b8257cb5e1eb6d36245d02ff8a3807 SHA-1: d80282f19a64504ef0c5fb5f9ab77c2d7efc800d SHA-256: b20f312930ee73083412769e1673441db5842b65e93c9deca93108b394fb5473
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for technical support or a scam.

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://ponafet.ru/strik?utm_term=why+wont+my+onn+bluetooth+headphones+connect PDF link annotation
    • https://cdn.sqhk.co/gozajare/hcmhgje/little_pony_birthday_cake_ideas.pdfIn PDF document text
    • http://sudesisobibimit.22web.org/14355453333.pdfIn PDF document text
    • http://detonic-deutschland.website/24305786951fxf63.pdfIn PDF document text
    • https://cdn.sqhk.co/wotabefej/g5Fbapa/unisa_application_form_for_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/hfgjlhe/muguzapinepo.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/bowexi.pdfIn PDF document text
    • http://edarudost.online/10322702462pzhhg.pdfIn PDF document text
    • http://galoomer.online/pipalet29ub.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/8006024.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/efIgggh/67014514393.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/ef26c73e810a.pdfIn PDF document text
    • http://ccckkkkk.space/divinity_original_sin_2_best_talents32yvv.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/6514916140.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/rerizalodemipok-guwevutenifi.pdfIn PDF document text
    • http://lawalek.iblogger.org/free_powerpoint_template_design_food.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/46585548800.pdfIn PDF document text
    • http://copyright-help-report.com/the_chrysalids_john_wyndham_reviewm87ps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nifusotajezunur.atwebpages.com/90965478772.pdfIn PDF document text
    • http://boponewutizubi.rf.gd/82303781610.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/96108627922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 5396 bytes
SHA-256: 8cb2041a4b54ea3f35d25229d3fdba0dfb6c3ce352325d6ca937b38c39259783
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10940 bytes
SHA-256: fa4f97f15958ee04b204062699184cc486d89a64b12d241986357720d3b9ed09
font_02_sfnt_off000119de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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