Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c6d79241c82410…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 09:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5751ad6c2e229a77f1af2dc6d044eab5 SHA-1: 931e51886bd16fb8a0439cdaaaee114bb1628bac SHA-256: 45c6d79241c82410277bef75014afdaed014b37cdde812ac336cb5b8353d19f0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that mimics a search result, likely intended to trick users into downloading a malicious payload or visiting a phishing site. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/award?keyword=milton+friedman+capitalismo+e+liberdade+pdf
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/fogenitufewipuw.pdf
    • https://cdn-cms.f-static.net/uploads/4487191/normal_6024279628b44.pdf
    • http://bejagofeteveba.22web.org/56102958520.pdf
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/376a5d8.pdf
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/lawilepi.pdf
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/sulipoxukofu.pdf
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/gabosoz.pdf
    • https://warubeduzubam.weebly.com/uploads/1/3/5/2/135298611/8ac88.pdf
    • https://cdn-cms.f-static.net/uploads/4393028/normal_606015c33712b.pdf
    • https://sifajovu.weebly.com/uploads/1/3/4/8/134874608/buwaruvafabi.pdf
    • http://kaxasujigunabew.iblogger.org/kenneth_cole_watch_rubber_strap_replacement.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://norenuwidubeg.rf.gd/20482983049.pdf
    • http://sufotef.rf.gd/corsair_k95_platinum_rgb_cherry_mx_speed.pdf
    • http://xigilozixorod.epizy.com/20724227915.pdf
    • https://s3.amazonaws.com/jixeremipet/85390165106.pdf
    • https://s3.amazonaws.com/bewibiwat/revekezuxapixelivika.pdf
    • https://s3.amazonaws.com/pogolo/how_do_you_build_a_house_in_sims_4_for_beginners.pdf
    • http://zewuvumanoxulo.rf.gd/gijusinifuxenojegafowiwov.pdf
    • https://s3.amazonaws.com/zidosozawok/cities_skylines_indir_android_oyun_club.pdf
    • http://jemejux.epizy.com/kedugekuv.pdf
    • http://mefomoximene.rf.gd/candle_flame_images_wallpapers.pdf
    • http://zewixezix.epizy.com/how_to_become_a_vet_assistant_uk.pdf
    • https://s3.amazonaws.com/nojemi/55941597374.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_off0000ee8c.bin
d1fa93bb8834b290fb4749ab722f499210a47997b2cde13fdd5b86eded2a3ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 5448 bytes
font_01_sfnt_off000100fe.bin
02a20f7ffff1ab70f27583357835a13a7d936bad3a7bc11804f3462654693b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 12712 bytes