Malicious PDF — malware analysis report

Static analysis result for SHA-256 d561862f83cd8977…

MALICIOUS

PDF

69.2 KB Created: 2021-02-19 16:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 872e9f73d6b1ed0f4a13dc8a39fcc760 SHA-1: d829a00c81c82240c10d428339dc4f8afaff4a41 SHA-256: d561862f83cd89772077cd873c97055be650da0b2e2d55afd39cdc236a6b9f26
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=que+hacer+en+un+terremoto PDF link annotation
    • https://parixaxagutu.weebly.com/uploads/1/3/4/4/134465429/9912286.pdfIn PDF document text
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/dabaremevigofiz.pdfIn PDF document text
    • https://tetusujofejami.weebly.com/uploads/1/3/2/6/132695476/viwazarobam-memixelejisega-linelutepam-mizig.pdfIn PDF document text
    • https://nidatufibamukun.weebly.com/uploads/1/3/4/1/134131265/deminogaxaparo-luxaluzow-fevenod-lasixuk.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/7Szhijf/my_airtel_recharge_history.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/jiYihid/call_of_infinite_air_warfare_apk_mod.pdfIn PDF document text
    • http://studyweb.site/29582565421un50i.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/HGjiUhb/tumofuwuvogamogasi.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/jh5Ghem/mermaids_1990_full_movie_123movies.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/ba9f81.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/i7heUia/the_room_store_furniture_in_richmond_va.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/firigugixujotov/ala_baburao_dj_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/nanazase.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/58997082944.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/php_formatter_in_vscode.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_off0000d155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD155 4888 bytes
SHA-256: ae451b2697f9d010155bcc7a3004b129a25dfea2cbeba9a28fb10c5d39a222c9
font_01_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 11432 bytes
SHA-256: 3717cef35e55f8e357e3bf4d38142814aa7d523f86a01057f6d348375d40e89a

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