Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca0fb95239f6eb3…

MALICIOUS

PDF

89.3 KB Created: 2021-02-25 05:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cf4919165ba5914594f45e7dfe899dfc SHA-1: 2806cd3d7a7ef1480ee0600bfcf11073701d6233 SHA-256: fca0fb95239f6eb31b639db78fa22b84635d35caaf025e1b27634f2c206995b9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=dodonpachi+dai-fukkatsu+rom PDF link annotation
    • http://xulubapatoso.scienceontheweb.net/the_final_quest_rick_joyner_audiobook.pdfIn PDF document text
    • http://numulul.mygamesonline.org/how_to_size_m50_gas_mask.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/nidevunet-majum-diwexor.pdfIn PDF document text
    • http://trokot-new.online/94992010743j1e04.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/wofolatowaduzorujako.pdfIn PDF document text
    • http://jobauthor.online/software_project_budget_proposal_templatevo8yb.pdfIn PDF document text
    • http://discount50it.pro/the_five_love_languages_by_gary_chapman_freewkyia.pdfIn PDF document text
    • http://5gusevshop.space/b-_form-_file_vue_bootstrap2uhmu.pdfIn PDF document text
    • http://ideal-it.fun/724352342724roav.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/7164573.pdfIn PDF document text
    • http://reduslimitalia-official.website/nemodanakapokddzvc.pdfIn PDF document text
    • http://mynasert.online/tulataribumixotiradegalulqrg.pdfIn PDF document text
    • http://galoomer.online/lord_of_the_flies_chapter_9_reading_and_study_guide_answer_key04zty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasanuvuwa.epizy.com/73947441958.pdfIn PDF document text
    • http://jelasojeb.rf.gd/badoo_premium_lifetime_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 6156 bytes
SHA-256: 45e0d5444124f22559522587c96d019f9893d168c31184ed153ca55655fa0fe0
font_01_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 5456 bytes
SHA-256: 3d8c51988c0f605b7118fb04812322b28b85debab31f113706546589ec4c5f06
font_02_sfnt_off000117e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 10472 bytes
SHA-256: f3e850660b462e407e4e713a94a7cd61b5afa439e00d929f1c46cb2ef41bb42e
font_03_sfnt_off00013bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEC 17940 bytes
SHA-256: 0c61206208f55be0e1b68b5278013f87e3ec31ff5f904fb5d6c0410dc824c2c4

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