Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae84daa266f4e71f…

MALICIOUS

PDF

112.0 KB Created: 2021-03-28 02:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 559f14d1cd4e238986be39f4fc060689 SHA-1: eb7b71a93b79b81ad293d08dcc313732e5e69e5e SHA-256: ae84daa266f4e71f0be3bd1ebeec02fcd87e964a3f95e875a1ccea53de5244d6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a prominent one pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=cite+in+latex+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5ffcac124c2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_601c64ef0f382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_604d844c0a584.pdfIn PDF document text
    • http://gijofabenetawix.66ghz.com/genidalovumosufum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_6026ac0b2bd7f.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/pukipipenixetobere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444630/normal_604906ee7cf35.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/antibiotics_safe_during_pregnancy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_6024fc586e2e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_60436790007e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_605d6a2b2dfd1.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/bacteriologia_clinica.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/napikejorupari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_601bd530701ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5fc9eb852b27f.pdfIn PDF document text
    • http://voxamuzovo.22web.org/98897164470.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kolenexe.epizy.com/rifts_palladium_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/android_architecture_components_github_java.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/gaxumogakin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d11fd4-5b6c-4972-b074-2de0ce7d9cff/fokumere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8969a8fc-9653-42b2-8365-50705a9348d0/40086371151.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/7565331575.pdfIn PDF document text
    • http://litopojijerel.epizy.com/how_do_i_reset_my_motorola_sbg6580_username_and_password.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/27254191635.pdfIn PDF document text
    • http://xebojipex.epizy.com/sadufifividawebi.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_off000175a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A1 4732 bytes
SHA-256: fe4e2db2a29320b3750c3cef05538096378c94e96f988ebc4812d6bb1cd82be5
font_01_sfnt_off000185d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185D8 13252 bytes
SHA-256: 6ada54918e0bc7e38a1fda567b85686657e1871747fb1af8c97324c3ddeba9d5

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