Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fcd537fd3886c0…

MALICIOUS

PDF

72.1 KB Created: 2021-02-23 00:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f09cefd9cd3fc9bbe1b55570070c2e75 SHA-1: f2a3d337fcd53fee611ac989c01b372a989f7714 SHA-256: 08fcd537fd3886c04f359f4469e9bd358064dbd4332264e44d3977ec93711959
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=dr+dre+compton+mp3+zip+download PDF link annotation
    • https://sixuvowapunara.weebly.com/uploads/1/3/0/7/130738553/fawuwomus.pdfIn PDF document text
    • http://handler-autoscout24.com/moisten_crossword_puzzle_answerp2jxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_6029804ccafb4.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/xuvitudaxawabol-xonuxela-pufubegirugag-natekekazamepa.pdfIn PDF document text
    • https://figinesixixe.weebly.com/uploads/1/3/3/9/133999389/gelimexukagugu.pdfIn PDF document text
    • https://negowisavu.weebly.com/uploads/1/3/1/4/131406226/viguzobipoba.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/gulapore/10589509965.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/upsssc_answer_key_2018_set_c.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/diviwumapivibo.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/15804888815.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/bomb_squad_pro_mod_apk_unlimited_tickets.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/converting_decimals_to_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/epidural_catheter_removal_guidelines_asra.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/layers_in_the_osi_model_and_tcp_ip_protocol_suite.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/fojefopesa.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/98975540754.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/lever_rule_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/2006_lanternfish_esl_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/sudewev.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_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 5348 bytes
SHA-256: cde2e583ecb6b968be8ad3f1d14c7cf63980b9735fa21284f217996bc1ace551
font_01_sfnt_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 10000 bytes
SHA-256: f6b0c5e35d8c7ae1fc1e0c308e788ae28201403a84b781cf657f92fde1c16527

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