Malicious PDF — malware analysis report

Static analysis result for SHA-256 3231ea919123b484…

MALICIOUS

PDF

68.6 KB Created: 2021-02-17 22:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0273c18f7afc070396b01eea0c2eeb03 SHA-1: 881946cabcc18fdbc0ecaaaff3b20785771b49bf SHA-256: 3231ea919123b484fb91866f46a20bfcfd823c1cd573f1cce5198a1a6d306ee7
196 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 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/wix?keyword=t+rex+spooby+skit+lyrics PDF link annotation
    • https://cdn.sqhk.co/pubamegumox/igjKjb2/cut_the_rope_bowling_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/89ST2if/spirit_airlines_phone_number_tampa.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/kavopezalas.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/ibijgjh/illusion_connect_global_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/hegijeZ/kukine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480412/normal_60085ae68fe30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_5fd7c56fd3b3a.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/kVPhaEp/95580848604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fec7a02c265b.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/sowewazulejewi/91722480002.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/android_developer_api_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/38504119953.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/last_week_weather_report_in_dharmapuri.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/nujepotobejusomamapojov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC543 3048 bytes
SHA-256: ee6caa5a4918f8c5499455f3560dfc65323b3ee1474969e17dfd45e27d54f4f6
font_01_sfnt_off0000d033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD033 5040 bytes
SHA-256: 49f9b25088ee765a7c53284ce1e13dc0452d88f7be3cd7f38f85de2c0869d553
font_02_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 10480 bytes
SHA-256: a4474ec2edc7881074dacd53ba13d35b206be6e3d68faa3e4084e797d09b3c5c