Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7d16a6b155148d…

MALICIOUS

PDF

89.1 KB Created: 2021-05-12 07:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 81164bf3a41f5dd41ed2fca7a3ac0fd6 SHA-1: 2e17773e8f66b06096197ff58fb5e14422fd9441 SHA-256: 4b7d16a6b155148de18ffa4f67f8eafb3dad1943eff742168dc0ca7780c1b143
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, including one pointing to 'ponafet.ru', suggesting an attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy on disposable hosting, further supporting a phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ponafet.ru/strik?utm_term=daniel+fast+meal+plan+south+africa PDF link annotation
    • http://vavazexowupex.medianewsonline.com/48852871407.pdfIn PDF document text
    • http://govnosiakxws.online/how_much_does_a_technical_writer_makenw4u5.pdfIn PDF document text
    • http://big-ita.space/jetedatawuugyux.pdfIn PDF document text
    • http://lnstagram-helping.live/33487208633xdrdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fedc4149eac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_602da7deb2664.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/lidewozusipaj.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/assimilation_rules_in_english.pdfIn PDF document text
    • http://handler-autoscout24.com/kegokutalobuwobowefuwez0unv.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/63684314774.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/vernalis_aptitude_questions_with_answers.pdfIn PDF document text
    • http://ramidavukul.medianewsonline.com/88918197553.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/cantor_s_intersection_theorem.pdfIn PDF document text
    • http://copyrighthelpcentral.com/wibolexasonijolawosp2t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5fc7490e7e120.pdfIn PDF document text
    • http://sezovoxil.22web.org/kewokomaf.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/define_straw_man_fallacy_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefixufedinokas.epizy.com/66953531880.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_7be8f9adae0e4967a3c05db908ba6f03.pdf?index=trueIn PDF document text
    • http://romepasuv.myartsonline.com/fogusikut.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_f6d09328899842a885ddcdc15fb18f7c.pdf?index=trueIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_2430b41f401d489398f13fe9e3dd18c9.pdf?index=trueIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_feb83a7ea31140bbbce20725b705174f.pdf?index=trueIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_142876af83a2496fabe8fb8cc88ce07b.pdf?index=trueIn PDF document text
    • http://kopedug.epizy.com/3418368654.pdfIn PDF document text
    • http://gikunipif.epizy.com/33516866002.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_off00011c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C98 5252 bytes
SHA-256: 5189e3b08dcf9c0314be92b9830505aa18e853e48497c4388521b3b2985b4bca
font_01_sfnt_off00012e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E56 11376 bytes
SHA-256: 4346b3684932417c521362fc48f3b7eb2eb74a81a953565685163b21f9913f30

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