Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cf5a3e27feb0f4…

MALICIOUS

PDF

73.0 KB Created: 2021-01-28 08:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 80e6a97148e59a1103be21da2239ed33 SHA-1: 8dbf7300ad650e427635d15d1d282cfc95562493 SHA-256: 83cf5a3e27feb0f47cd9bf3d10e5cc12f3bf45b4046f239b951e3377d7f0ceae
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://leonvi.ru/123?utm_term=asian+health+services+center PDF link annotation
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/841452.pdfIn PDF document text
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/e7dbf5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5feb179b2301a.pdfIn PDF document text
    • http://wordsidepost.top/diy_ideas_for_teensz0cd0.pdfIn PDF document text
    • http://dujoxizuzepofom.iblogger.org/dtv_channel_guide_miami.pdfIn PDF document text
    • http://libralab.digital/whatsapp_business_apk_download_for_jio_phonebgha7.pdfIn PDF document text
    • http://motivawka.online/484363016639a2bx.pdfIn PDF document text
    • http://relax35.ru/unconscious_bias_training_materialsgse9e.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/6780023.pdfIn PDF document text
    • http://thedefenseforge.com/why_did_we_storm_the_beaches_of_normandy4z1r3.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/pidufozu/after_effects_free_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/android_phone_comparison_tool.pdfIn PDF document text
    • http://luremugaxufarup.epizy.com/banshee_prime_build_no_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/toefl_speaking_topics_answers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/v_unbeatable_agt_2019_final_performance.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_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 4936 bytes
SHA-256: 8b1a2168d4a68e399d1f4620d870b06bf11e954d320886cace3835d2dd5deb04
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10692 bytes
SHA-256: 3a41082cff8c13ef7ccea1e471d61881549424ba67b12886e14ee6336d562462