Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c484222173c07f…

MALICIOUS

PDF

82.4 KB Created: 2021-03-19 20:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6acbb4af02a9537708cd0cf4abbfdf53 SHA-1: 2ac9b96274beb2688e5bbc65bf5bd16268a686b2 SHA-256: 30c484222173c07f7e3246d1f9e62ec2b6052b9842ba125a759641ea461de1fa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains and appear to be part of a link farm. The document body text, though partially corrupted, suggests a lure related to finding divorce papers online, which is a common tactic for phishing or malware distribution. ClamAV and ML heuristics confirm the malicious nature of the file, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/aws?utm_term=how+can+i+find+my+divorce+papers+online
    • https://cdn.sqhk.co/manoxixo/iFchbLh/98204752679.pdf
    • https://cdn.sqhk.co/waxolulum/cieihSv/share_chat_status_marathi_video_new_song.pdf
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd64de52689a.pdf
    • https://cdn.sqhk.co/wofazexej/exRgfdu/lurirexemejafemomobe.pdf
    • https://cdn.sqhk.co/furugilenu/nTTijie/bypass_android_lock_screen_pin_software.pdf
    • https://cdn.sqhk.co/lovojekaboxi/igoxgjY/scp_6789_siren_head_game.pdf
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/8523802.pdf
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/litixepu-delubeso-podujigezisemoj-jevat.pdf
    • https://nekusudowup.weebly.com/uploads/1/3/5/3/135315851/2513295.pdf
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5ff578fbc5828.pdf
    • https://cdn-cms.f-static.net/uploads/4382771/normal_6036d94677ed3.pdf
    • https://cdn-cms.f-static.net/uploads/4489409/normal_602762128f402.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovisak/20115077503.pdf
    • https://s3.amazonaws.com/xapota/67214781752.pdf
    • https://s3.amazonaws.com/lepefi/dofafajipoteviviwejidazu.pdf
    • https://s3.amazonaws.com/tazopaju/fitted_sheet_set_double.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/72573776731.pdf
    • https://s3.amazonaws.com/luxelula/thich_nhat_hanh_book_peace_is_every_step.pdf
    • https://s3.amazonaws.com/minaxigevani/what_does_the_bible_say_about_knowing_gods_word.pdf
    • https://s3.amazonaws.com/nitatotol/vemav.pdf
    • https://s3.amazonaws.com/marimejerebo/86318573428.pdf
    • https://s3.amazonaws.com/titugome/old_school_runescape_blackjack_guide.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_off000102e5.bin
cb9375d79f1064a34060291988986a7763ab55118bbf989d02e579a7f627a910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 5516 bytes
font_01_sfnt_off000115af.bin
d4f276c42ae7e0cc7646a7f2ea8ea99377faeb722eb239df3ede8e5870a4a197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 10840 bytes

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