Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96eca0a3b43ac8…

MALICIOUS

PDF

74.1 KB Created: 2021-06-01 17:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c512e0384c4b75bf8924fe38f503c79c SHA-1: 5d13ac3a79424db9b5161e059fa0615be65723ed SHA-256: ab96eca0a3b43ac83cc71f7523643dcf5cb3c56c2b9bcfe6a3635cf20f714683
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing given the URL content. No scripts were extracted, but the PDF structure itself is used to host and redirect to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/pbw?utm_term=heroes+item+build+mobile+legends PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5feea0ddaada2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_6037824be7dcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc834b6039e1.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/2619639.pdfIn PDF document text
    • https://wulidinuwiniz.weebly.com/uploads/1/3/5/3/135326152/sisafiradibovutef.pdfIn PDF document text
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/7a3c0e4a3ba.pdfIn PDF document text
    • https://giwojagamepebew.weebly.com/uploads/1/3/4/8/134881383/ritagemomebu.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/5d3245e081eed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_6056d028517c5.pdfIn PDF document text
    • https://kakumipixuwa.weebly.com/uploads/1/3/1/4/131406962/3bdda48cdcec86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_5fcd7ea652262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziduzobif.pbworks.com/f/what_is_reddit_transparency_report.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144412059/2019_hellcat_red_eye_charger.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144422313/public_administration_books_for_upsc_optional.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/voloxejovejijetamoj.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/file_browser_for_samsung_smart_tv.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/f/wifi_bruteforcer_-_fsecurify_apkpure.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/how_many_species_of_dinosaurs_are_there_in_the_world.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144412536/vamupaxodoxedigexor.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5036 bytes
SHA-256: 0193db16e294d9394c2ab2d63844950866dbd068f1118789a829e6251b9d008e
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 10572 bytes
SHA-256: 351f2194831b23a60fa36af1e0503f3fd4ddd448f5a70ee8b5fb3bc3af321d68

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