Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c45719d42d35e28…

MALICIOUS

PDF

81.8 KB Created: 2021-03-21 04:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebecab33ac2958124a7f0559a6070304 SHA-1: 37a6fa8ea1af7f8445dcac34a1f27cb7dd3fd416 SHA-256: 1c45719d42d35e2815c5e095bfa60ea32f110792010946350aa5bbc37e595bf5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The document body, though heavily obfuscated, contains references to 'Nativity certificate online kerala' and the authoring application 'wkhtmltopdf', suggesting a lure to a fake service. The presence of multiple external URIs, including one flagged as a potential phishing target, further supports this. No scripts were extracted, but the PDF structure itself likely contains malicious links or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=nativity+certificate++online+kerala
    • https://cdn-cms.f-static.net/uploads/4416144/normal_60128b48a93d2.pdf
    • http://malanefire.sportsontheweb.net/26614747935.pdf
    • https://cdn.sqhk.co/wevafofed/6SGlbGs/all_recipes_matrimonial_cake.pdf
    • http://jofufunobek.sportsontheweb.net/what_are_different_conflict_resolution_techniques.pdf
    • https://cdn-cms.f-static.net/uploads/4480898/normal_603291788cdfe.pdf
    • https://cdn.sqhk.co/melipetoluf/jchchgO/40072902591.pdf
    • http://pemufosapakem.mypressonline.com/what_jobs_do_interior_designers_do.pdf
    • http://gojawufeki.getenjoyment.net/makexukulu.pdf
    • http://zukirudon.mypressonline.com/64678221617.pdf
    • https://cdn-cms.f-static.net/uploads/4402960/normal_603903cd1e7b5.pdf
    • https://cdn.sqhk.co/fujotojaxob/iaUgiji/gateteziwebazogapi.pdf
    • https://cdn.sqhk.co/lazodadevab/jjjcjd2/pezekumite.pdf
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fe811b17fcd9.pdf
    • https://cdn.sqhk.co/nobutowug/he0Rjjq/9071620019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/juzinaramip/lamidazumutatalexu.pdf
    • https://s3.amazonaws.com/potamotaz/jegelifev.pdf
    • https://s3.amazonaws.com/fajeloninesitel/wafuvif.pdf
    • https://s3.amazonaws.com/netinuwa/truyn_kiu_ca_nguyn_du_ng_vn_lp_9.pdf
    • https://s3.amazonaws.com/jodabiladezot/neptunia_re_birth1_leveling_guide.pdf
    • http://fanalejowegop.atwebpages.com/what_is_the_zone_of_proximal_development_in_the_classroom.pdf
    • http://zevusup.atwebpages.com/what_is_a_call_to_action_in_an_argumentative_essay.pdf
    • https://s3.amazonaws.com/fefurorobumi/kexewubotivu.pdf
    • https://s3.amazonaws.com/dazinibonofobi/69058552897.pdf
    • https://s3.amazonaws.com/pisedij/c._v_format_arabic.pdf
    • https://s3.amazonaws.com/bikikanafopavu/bikoporitelofefuxez.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f9.bin
9f7906c832bdf33a67eb369d5ca12ceb766ec6188c856abc25ead698d760a13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 4680 bytes
font_01_sfnt_off000103f6.bin
570c9a53c61bbf4aa03361b6461046817a1585b4fbb90a348f5990d5256a809c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 12232 bytes
font_02_sfnt_off00012b52.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B52 4324 bytes

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