Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ab3ed29665d572…

MALICIOUS

PDF

83.3 KB Created: 2021-03-29 21:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d958f173499d0903c0400de8bd8f510f SHA-1: 28b22cf5c9265e61ff94f51c1b23f508fdf76c3a SHA-256: b0ab3ed29665d57217879010bdd2d6f32dbb9bb1d89835e702724506a5110e4f
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, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, suggests an attempt to lure users with educational material, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=ejercicios+de+porcentajes+para+ni%25C3%25B1os+de+primaria PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5ffb83f3a984d.pdfIn PDF document text
    • http://samettemiz.xyz/fajajaxejowuwolifed64bkg.pdfIn PDF document text
    • http://direkepexeg.22web.org/sefotimuvoganozubemo.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/bemipa_bipomofodisil_wapakazexuruxal.pdfIn PDF document text
    • https://sagiwotagemo.weebly.com/uploads/1/3/1/8/131871993/dosunepaladi_xizesan_pidet.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/nalofipibazakinolovonafip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_5fd90a5e2197b.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/69958063963.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/salone.pdfIn PDF document text
    • http://kibasemenatax.22web.org/fukupefopogivabopi.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/sogotetenezimutulinujem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_6015a548586c5.pdfIn PDF document text
    • https://xipumimetadefol.weebly.com/uploads/1/3/4/3/134358687/ddaf69d63.pdfIn PDF document text
    • http://fatunatet.getenjoyment.net/isometric_graph_paper.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/starbucks_menu_nutrition.pdfIn PDF document text
    • https://jevoweli.weebly.com/uploads/1/3/5/9/135958856/limirufiwi-tapivos-geperudugizapun.pdfIn PDF document text
    • http://edayafar.xyz/the_history_of_western_philosophy_amazon3i4jr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_6023cd3c4d9ca.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/what_is_statistical_estimation_of_scale_economies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fdebc7f4abd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemovimuwopete.atwebpages.com/towekuweza.pdfIn PDF document text
    • http://nidotezuk.epizy.com/31525519299.pdfIn PDF document text
    • http://zufabilo.rf.gd/gateway_2nd_edition_a2_answers.pdfIn PDF document text
    • http://lobosenus.epizy.com/97736827744.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_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 5432 bytes
SHA-256: d358ac0bee3ef276e5b14b0b5953498546e4243e9bab5c89e08ceba0dfcde131
font_01_sfnt_off00011460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11460 12416 bytes
SHA-256: fb59240b2913f72be4535123be02c497d1225813c90a3b51f2da3180c4f9e35b

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