Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b474c1e3e3f6ee…

MALICIOUS

PDF

73.3 KB Created: 2021-02-28 15:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548d68166d619cc616e61e6fc285e135 SHA-1: 28d41e7e180f3bc7e49d705e06285a0c93ce0eff SHA-256: 73b474c1e3e3f6eeb161229c5fc5b4137a11447232203ac075bd9166674fa393
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=commercial+coke+cooler+for+sale', which is likely a phishing lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content, potentially as part of a phishing campaign.

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
  • 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=commercial+coke+cooler+for+sale
    • https://cdn.sqhk.co/tajixixejafi/aieigfd/color_splash_text_effect_photoshop.pdf
    • https://cdn.sqhk.co/velabolo/pjijdXp/pafixepe.pdf
    • https://cdn.sqhk.co/verexumifo/gAsFjaK/2848299869.pdf
    • https://cdn.sqhk.co/bexamajuw/iajihd7/sisafedefunol.pdf
    • https://cdn.sqhk.co/toledexipez/gjhNdhh/write_on_using_apple_pencil.pdf
    • https://cdn.sqhk.co/josipinu/cwhj0ia/80714023027.pdf
    • https://cdn.sqhk.co/fudamewojaf/cLkoHgf/34909267325.pdf
    • https://cdn.sqhk.co/tefupudoma/dTidKEb/repost_for_instagram_apk.pdf
    • http://lopekojupapo.22web.org/68931286533.pdf
    • https://cdn.sqhk.co/febutatesu/iajeihU/social_intelligence_meaning_and_examples.pdf
    • http://prizinsta.online/comment_punir_un_pnpoe0j.pdf
    • https://cdn.sqhk.co/ritasuxa/rShejhN/manojuka.pdf
    • https://cdn.sqhk.co/forexidof/hhhijj5/51832057411.pdf
    • https://cdn.sqhk.co/towevefizub/ccaLv26/34048260122.pdf
    • http://forsage.pw/44871848523u86is.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wajifinome.epizy.com/12324031295.pdf
    • https://s3.amazonaws.com/zafijukopa/jinenefakatewex.pdf
    • http://pirefalanife.epizy.com/sazazajuma.pdf
    • http://jiwepatifon.rf.gd/zanibonusapiwi.pdf
    • https://s3.amazonaws.com/luworizesupox/cosmos_laundromat_trailer.pdf
    • http://lusiromipu.epizy.com/divadujamediro.pdf
    • https://s3.amazonaws.com/gafedupeba/air_force_airfield_driving_cbt_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfdd.bin
9f3ddceb3b4fc763e6d7f2952833fcc97dcb7c8527dc0398109b9b8aafd645d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 4996 bytes
font_01_sfnt_off0000f0c2.bin
65d5143756dcea8c6742acc8011ef964e02b5bd92e6152c1e7c266737d080f05
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 11456 bytes