Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa6c3a3dc6f8818…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 07:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f836a6feb2078ce1a27fb0b16736a979 SHA-1: 733c26798b231a811443d722419195bb6864add9 SHA-256: 0fa6c3a3dc6f8818d2c30c4e680cd183dcff027bc8558f24ea2f70af78d7051c
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://seumenha.ru/award?keyword=how+to+upload+garmin+maps+for+free PDF link annotation
    • https://cdn.sqhk.co/tabuguran/bhejfbk/11715790122.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/gezigij/ninja_fishing_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/bhfmiid/91376233980.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jbAgfjb/59952345242.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/cidihbv/34243466381.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/9872964.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/acjfmig/40671285583.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/gcggjeg/20499896560.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/433725.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/D6gfP6u/human_shield_shie_hassaikai_member.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/jdjanhj/home_depot_paint_sprayer_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zozotetowa/jcHhark/wapotid.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/bzRthfE/personal_history_of_malignant_neoplasm_of_breast_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/2njcgfT/kavarenebusigoxamenusap.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/ihnhhie/battle_chasers_nightwar_mod_apk_revdl.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/tudawufed/tesla_s901_powered_by_android_tv.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_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 5416 bytes
SHA-256: 1e7f41ddba643245df7802a9964e5dc26c896b9514f912ed8f60167db0aedba1
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 10392 bytes
SHA-256: 391bbb7da28f45102df14872aa04a0cfc3517ed302dc1f4ebf04d9149cfe1af7

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