Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ca9985546858ec…

MALICIOUS

PDF

71.7 KB Created: 2021-02-10 15:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9822884c5000b80b990e80d6d0873d19 SHA-1: b1ed7efe20d60bcf570bd303fe885ab19a3ba0f8 SHA-256: b7ca9985546858ecc107f865e6472f984b0d4bb51311e1117b07063a25aef42f
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/123?utm_term=big+slick+poker+tournament PDF link annotation
    • https://cdn.sqhk.co/xopuwatipo/hjdhgyw/wood_carving_knife_interchangeable_blades.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/fjjjass/columbus_blue_jackets_hockey_fights_cancer_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ijeZibr/xbox_360_wireless_headset_battery_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/rafujajek/b2BiiF6/limaminagetutidexuvawu.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/eAhjidb/how_to_write_proposal_for_project_work.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/iiyjgif/lekexojukuvabidi.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/ueidhi9/soxide.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/djjjfge/84429638986.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/1yiaUii/nvidia_shield_cracked_games.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/vizegemawokaxe/86852121338.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/cervical_screening_australia_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/formation_agent_d_escale_air_france_prix.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/ableton_10_suite_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/6930376056.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/87711568825.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_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 5364 bytes
SHA-256: 8baa21a2b26d6a475146a847f324782bb698044317d61de94b1684ce189368e8
font_01_sfnt_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 11588 bytes
SHA-256: d8bdcc9cb7d023cbacc92f94c76594acd0555109d567f474ef2223f4cdc0d8ab