Malicious PDF — malware analysis report

Static analysis result for SHA-256 122f663beebcca4e…

MALICIOUS

PDF

102.3 KB Created: 2021-04-02 11:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd16ae192388e8520fef2143a09b394e SHA-1: c12fdfb303ccb41d182c2fad7f3e3f8bb9487c3f SHA-256: 122f663beebcca4e52b0e85a7bd7f6639f2d76586811aaeee96d49fe38e34f9b
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The embedded URL and the primary external URI suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9415

Heuristics 4

  • 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
  • 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://pelibifir.ru/award?keyword=blogspot+libros+pdf+merodeadora
    • https://cdn.sqhk.co/nizufalagef/gcmJhdp/64511389116.pdf
    • https://cdn.sqhk.co/zatovafer/FRggugb/grand_hotel_mania_level_37_regrata.pdf
    • https://cdn.sqhk.co/lerepetoni/h5ajagg/62215499834.pdf
    • https://cdn.sqhk.co/sileluzorupo/9oG1Ddy/alaska_airlines_iphone_wallpaper.pdf
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/3983433.pdf
    • https://cdn.sqhk.co/ragejeli/agfhbZv/28218743839.pdf
    • https://cdn.sqhk.co/verexumifo/cthha0j/bobepanerababe.pdf
    • https://cdn.sqhk.co/tipefima/VSjdjjq/13997811990.pdf
    • https://cdn.sqhk.co/vetukalujir/VieTUvL/funny_animal_memes_clean_2019.pdf
    • https://pesawesezopi.weebly.com/uploads/1/3/4/3/134327800/sosupo_nifizifuji_sivedepesuj_palujaxemoved.pdf
    • https://cdn.sqhk.co/dujujema/lgj6sjb/ice_hockey_equipment_store_near_me.pdf
    • https://cdn.sqhk.co/lazemowul/jicijDi/hd_boy_skins_for_minecraft.pdf
    • https://cdn.sqhk.co/zomuzuta/esihihh/sudenometuxogiduwomi.pdf
    • https://cdn.sqhk.co/libuzewis/YtjbjbM/billie_eilish_brother_girlfriend_meme.pdf
    • https://cdn.sqhk.co/dopuwene/Kifojd0/granny_smith_apple_puree_near_me.pdf
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/xokanefepo.pdf
    • https://volamajujidek.weebly.com/uploads/1/3/4/6/134667755/kizobutorabivabakip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vetamedisoz/ncandweni_christ_ambassadors_songs.pdf
    • https://s3.amazonaws.com/jukezeluf/english_grammar_book_class_9-10.pdf
    • https://s3.amazonaws.com/robumuduluwise/89477108759.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/solid_angle_concept.pdf
    • https://s3.amazonaws.com/mudurixo/consort_medical_annual_report_2015.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000177d2.bin
ec261a1a056c285f326f2d7019f8911f3d9bae5dcb8fc5a9f1bd04686b016e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177D2 5232 bytes

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