Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b673b9aeb98f3e9…

MALICIOUS

PDF

81.0 KB Created: 2021-03-23 00:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c65b50c3fe8d28e156718bb46132b3ba SHA-1: 7288a9bba07debdf46b89e603d750cabe2ef885b SHA-256: 4b673b9aeb98f3e9831e1c67c91661ce23131e82557e84e5ba4a670a4ad9d36e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics indicate a likely attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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.
  • 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=troy+bilt+self+propelled+mower+replacement+wheels PDF link annotation
    • http://fosonelotila.medianewsonline.com/16062741623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_60360a4fef1c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_6052d0d4b021d.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/yard_machine_snow_blower_22_oil.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/cef265472.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/jopize.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/bd6abca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5fe3814295bb6.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/tesozujuvudupabeseb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_5ff5671e3cceb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371003/normal_5ff2d531909e4.pdfIn PDF document text
    • http://gezekijoj.iblogger.org/9666737376.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/pafamuxikobefegut.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/kevuviketedexelus.pdfIn PDF document text
    • http://zoviruk.22web.org/jejobi.pdfIn PDF document text
    • https://tafulagi.weebly.com/uploads/1/3/4/6/134608062/352d5c.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/rukopotojemovepaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/xarofiwoz.pdfIn PDF document text
    • http://niwepikos.rf.gd/rerisari.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/42859535563.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/path_of_exile_prefix_suffix_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/witcher_3_walkthrough_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/xorodokukejon.pdfIn PDF document text
    • http://nexopuvesoreben.epizy.com/divavukorolawo.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/international_financial_management_by_jeff_madura_9th_edition_solution_manual.pdfIn PDF document text
    • http://xexasuwoxomiba.rf.gd/broken_heart_songs_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/95471618264.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/grammarly_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/audible._co._uk_app.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_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 5676 bytes
SHA-256: 65aefcba286d5acf96d4672b7e4dc0d64e030512379db91361ac72977ca1a3ce
font_01_sfnt_off00010ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 11408 bytes
SHA-256: 555c6731ca16e17986850ebe9711711427b0fccb58905ee087b03e78cd5aed63

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