Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab18839acf25e3d…

MALICIOUS

PDF

81.1 KB Created: 2021-03-01 15:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c863d6ac6f992f6ca02fe7139d8cf4a8 SHA-1: e5ae1e8eaca450373dbbd51fd2cb38ada9993283 SHA-256: 4ab18839acf25e3d641f0458dfab939023ef20059d06cf124ecddcdf3eb5d43c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a recipe book, aligning with common social engineering tactics.

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://vilenefex.ru/wix?keyword=wolfgang+puck+mini+rice+cooker+recipe+book
    • https://cdn.sqhk.co/panafilaputu/DjeU4wt/buxosolapukisoduniniman.pdf
    • https://static.s123-cdn-static.com/uploads/4370542/normal_60025a52a7cc9.pdf
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5fdad6da46cd4.pdf
    • https://cdn.sqhk.co/baxorurifina/OMhcghP/bridal_wedding_dress_online_shopping.pdf
    • https://cdn.sqhk.co/sidigodoga/LcgcpZi/xozazakal.pdf
    • https://cdn-cms.f-static.net/uploads/4376371/normal_6035fa2138dcb.pdf
    • https://cdn-cms.f-static.net/uploads/4479933/normal_600cc977886e1.pdf
    • https://static.s123-cdn-static.com/uploads/4380545/normal_5fceaf28a05f4.pdf
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/xezel.pdf
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5ffcb92fde770.pdf
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/sanasorubukedimog.pdf
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/xexedugija.pdf
    • https://cdn-cms.f-static.net/uploads/4492918/normal_5fe8816014a86.pdf
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/venurivu-vovumiraro-sezoxotilikuxup-wikefebimi.pdf
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/2176024.pdf
    • https://cdn.sqhk.co/vibisidumes/txJBhii/yellow_apples_near_me.pdf
    • http://dipazekonowa.mypressonline.com/roomba_595_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5fdfdc1a8cdc8.pdf
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/pavixawamoxeta.pdf
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/52acff3ed70e.pdf
    • http://nigavereke.mygamesonline.org/81458474308.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pulutugorivexek.atwebpages.com/adidas_watch_all_black_jersey.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_off0000f4d3.bin
745b0343d24651cf195e6a95e7315c362c2f0f3666c3141aed783a137d55919a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 5376 bytes
font_01_sfnt_off0001071e.bin
185576124a58336a6e54ee150e31bddc35ae97c938b9b2406c9532f3b8b0c818
pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 15240 bytes