Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc969cc2a9330a8f…

MALICIOUS

PDF

81.6 KB Created: 2021-02-20 16:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1a9862da9c0c769300e0fcb3d98094f SHA-1: e3f0d707c41f0b21fac88a51c71edcf0a662f708 SHA-256: fc969cc2a9330a8f9016c723de646304f70a4e0945fd8d09e1b2367b90d7d3db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and it contains a critical heuristic firing for a malicious redirector link. The embedded URL `https://crophysi.ru/wix?keyword=skills+worksheet+reteaching+health+answers` is likely used to phish for credentials or distribute further malware. While no scripts were explicitly extracted, the PDF structure and the malicious URL indicate an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=skills+worksheet+reteaching+health+answers In PDF document text
    • https://cdn.sqhk.co/beratinuga/hczieje/dreamfolks_dragonpass_membership.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/E9thejj/ice_breaker_questions_for_young_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/ghijt0u/28310425855.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/xXdijib/20388819272.pdfIn PDF document text
    • https://cdn.sqhk.co/livoluxuwad/jbQgjzw/5404209473.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/xyQicND/area_of_a_right_triangle_formula_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/wjjPiQu/ping_pong_the_animation_extra_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/geCgieu/lagagidufazuga.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/gmZiCgj/royal_caribbean_international_cruise_ship_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/zichjhx/maxi_craft_exploration_master.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/bMMjige/colt_express_bandits_doc.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/ghSibcB/tonewiwes.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/khjNgfp/80639936145.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/8tiibtk/unnatural_selection_muse_guitar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386829/normal_5ff96519ea068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bojafazes/short_grooms_speech_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/37397395091.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 3396 bytes
SHA-256: a79d71b8599c023a80ee39100fbf4e2e1f7b6555d56bd7a18aa469e02142d8cb
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 5108 bytes
SHA-256: cde4316fc5cd867264cff9a10022aa7720232021b4e837c57123a1cb094292b3
font_02_sfnt_off00010515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10515 11120 bytes
SHA-256: 20d409fd23276e4845c7b6dcd9d83117b6eb0ea39c1fb3c3c245dbaf710d5917
font_03_sfnt_off00012a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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