Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf097dda030415c…

MALICIOUS

PDF

84.1 KB Created: 2021-05-02 05:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 359843f9b58a5c07678a51e3636f2fe6 SHA-1: ecb29abd035d93c26f8d1cfee11d5a32da0e5f76 SHA-256: fbf097dda030415c46d0645b17523a9dc12563c91eed069879b2cb230c66634c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=how+can+i+make+my+gy6+150cc+faster PDF link annotation
    • https://cdn.sqhk.co/xarozowuzosa/jfBujaX/rice_burners_for_sale.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/innova_3020_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/W7OVhgi/josey_jewell_injury_report.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/dhdudew/2765785677.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/epidemic_typhus.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/3d_printing_designs_fun_and_functional_projects.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/41384206265.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/RYFhmU8/40603633643.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/adjectives_explanation.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/8heijig/photo_studio_backdrop_paper.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/23859473507.pdfIn PDF document text
    • http://kimidenexikox.getenjoyment.net/integral_calculus.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
    • http://fojakosi.atwebpages.com/dikifularukubozoka.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/avira_antivirus_free_for_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e65ecb-27a3-4d34-901f-b2b8d652cd9b/61486864303.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/specified_platform_toolset_v140_xp_is_not_installed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80bbdfb0-6000-4d8c-bce6-e9e6eb955252/lizejabilekefutunam.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/68514845376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f5feb0-290a-4f9c-99ea-c93d8b13119e/resistance_bands_workout_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/53965476002.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/can_you_send_money_in_the_post_royal_mail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12651ccc-dd7f-4341-8ca7-4b34f2939447/maytag_bravos_washer_clean_out.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/nidoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f958a8-16f4-48c7-9678-e674e48fa140/samsung_un40j5200af_wall_mount_screw_size.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 5648 bytes
SHA-256: 43e0ce7e4f893f9c5b46ade60310fdbf908dcde721ea7f0896b100b286206742
font_01_sfnt_off00010ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE4 11148 bytes
SHA-256: bf06223c5482cf22e4bcd8fa5c14f8829fb9297b0103aae864c82402d5ad8c37
font_02_sfnt_off000132e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361