Malicious PDF — malware analysis report

Static analysis result for SHA-256 2846060297e8f931…

MALICIOUS

PDF

87.4 KB Created: 2021-05-02 22:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b96fe15802ced00b29e5988eb295becb SHA-1: 2245e648805715fa833a26983be05be0ff044d3d SHA-256: 2846060297e8f93100316367d8b37c6de0e005d360d5365bbcb763e02726e98f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://pelibifir.ru/strik?utm_term=vampire+diaries+cast+season+1+episode+1', being a potential phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to host malicious content, further supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=vampire+diaries+cast+season+1+episode+1 PDF link annotation
    • http://lnstagram-help-businesss.com/dark_ghetto_kenneth_clarki5b2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fc7a5c444667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450747/normal_604502f4b5467.pdfIn PDF document text
    • http://gasufulezexe.22web.org/sufoxegozexegon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482407/normal_60090d63cff88.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/coliformes_totales_en_alimentos.pdfIn PDF document text
    • http://fruitik.space/90802778669ocar8.pdfIn PDF document text
    • http://jabisoj.22web.org/anova_test_example.pdfIn PDF document text
    • http://christmas-gift.ru/74675075948alfjf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5fd28b2480499.pdfIn PDF document text
    • http://dukofinezamidol.22web.org/66026386791.pdfIn PDF document text
    • http://amaryllis.space/can_i_use_epic_on_ipadvdlu5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_600f99b673f80.pdfIn PDF document text
    • http://4bochki.ru/braava_beeps_while_charging7ugtw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/33607385363.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/92280651376.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/47732239752.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/download_twilight_eclipse_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/remidowezuwigaz.pdfIn PDF document text
    • http://pirigebosagome.rf.gd/kokoro_yoga_videos.pdfIn PDF document text
    • http://ketosamijirun.epizy.com/fresh_wind_fresh_fire_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/nebevonodowoga.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/84021210837.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/danganronpa_2_chapter_3_trial_guide.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_off00011a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A64 5204 bytes
SHA-256: 98c778415d4c15006ea665e699c5ec876cd9e95e33c974a941d271fef8cd8a0a
font_01_sfnt_off00012c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C07 10368 bytes
SHA-256: 12ade986bdacb7be0e2f91013631c0f41815252efad5b611542db8560baf341f

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