Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5bd09300301777…

MALICIOUS

PDF

68.4 KB Created: 2021-02-26 18:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a64a2c2cc8033c8ba7d69ac1c6d9cccc SHA-1: 3d01f92321dbc04f5fe8e149aafb244d6369edc2 SHA-256: 6f5bd09300301777aa435021ac84032876c950a2e31ef64fa84eb4b1fb8373d0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=mercruiser+service+manual+16+pdf PDF link annotation
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/fufeja_zulaw_nibovope_xufejubuvasof.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/Eig9hek/pet_rescue_saga_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/raJXhdI/barbeque_grill_sale.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/joining_report_sample_application.pdfIn PDF document text
    • https://cdn.sqhk.co/bigokukanuf/jeqxLii/74727814283.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/jiWDgwl/sports_borders_for_word.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/sunobagoxadod.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/XjaJkib/poganuxipixideput.pdfIn PDF document text
    • https://xoboxevoz.weebly.com/uploads/1/3/2/7/132740619/1006730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivupibutori.rf.gd/catalog_template_ai_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/template_powerpoint_animados_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/fake_a_level_results_sheet.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_off0000cf72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF72 5572 bytes
SHA-256: 95ea27fbc16d4557d29731d91d3600d801ceeaa5a13bd7ae60d9767e88ba1d51
font_01_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 10196 bytes
SHA-256: 07e44f96851122ea237e981343900efd3cb92af44140035c42dd1cf3fff8740b