Malicious PDF — malware analysis report

Static analysis result for SHA-256 557d46c0e139f4b6…

MALICIOUS

PDF

70.8 KB Created: 2021-02-14 13:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ae654d15f03b27153209e94538233cd0 SHA-1: 69feef6eae248115a8e19b476cf4583edd1a8eeb SHA-256: 557d46c0e139f4b6143ce3856c108c07c37417a4e47da2d717487df684e25332
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=audio+activity+capitulo+2a+realidades+1+answers+page+38 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5ffd00ae1cece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_6013b3ee2495e.pdfIn PDF document text
    • https://cdn.sqhk.co/gobonuzuwif/jSLAk5m/free_popping_bubbles_game.pdfIn PDF document text
    • http://fezibinuzot.iblogger.org/81823786800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_6019f43ca092c.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/lGheZgd/nazisif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_60037291833fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5fffc5caa7b81.pdfIn PDF document text
    • http://bopigupuwag.iblogger.org/commands_in_cmd_prompt.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/dalava/amazon_prime_movies_to_phone.pdfIn PDF document text
    • http://batogejupimole.rf.gd/zudalov.pdfIn PDF document text
    • http://vusegax.rf.gd/ielts_fever_general_reading_test_5_answers.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_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 6024 bytes
SHA-256: 8b59e3df55eae43c5d7acc0a40ad0983e14c0013482fc4bbeb12a8a6e56b949c
font_01_sfnt_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 10608 bytes
SHA-256: fad96fdd2e74da09db3a5bcce206fa1d6bcfce44f9f660ce6754b2a3d1cad1fa