Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4278fd26d9fe9c…

MALICIOUS

PDF

75.8 KB Created: 2021-04-10 21:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1109063ef0ef6f462cc0649c1d0061c1 SHA-1: 7f365e856747f4ba0e78da3925b5d9cd391a4340 SHA-256: fb4278fd26d9fe9caf386a1b74e4387556f608ab13df902afb6ba0843d7ae29d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to a 'Supertraining book'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=supertraining+book+yuri+verkhoshansky
    • https://cdn.sqhk.co/tuvameboroke/jdwSOgE/the_gift_johnny_cash_review.pdf
    • https://cdn.sqhk.co/gisatajofo/djacjg2/lost_island_waterpark_adventure_golf_kissimmee_fl.pdf
    • http://debodopox.iblogger.org/bezav.pdf
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fdf8c2f6bf20.pdf
    • http://gisaxisiburu.66ghz.com/continuation_sheet_sample.pdf
    • https://cdn.sqhk.co/rilowikapaz/ihbgjgg/joker_quotes_hd_wallpaper_4k_download_for_pc.pdf
    • http://finoginujowiwi.mypressonline.com/fungsi_lembaga_pendidikan_islam.pdf
    • https://cdn.sqhk.co/potiribuwuf/cjhlqlB/gawekobudijigamuzitupuw.pdf
    • http://kenurexil.22web.org/97737420594.pdf
    • https://cdn-cms.f-static.net/uploads/4451945/normal_6039ed9d0658a.pdf
    • https://cdn.sqhk.co/zatovafer/hcichgL/45316067743.pdf
    • http://wewogokuwidu.mywebcommunity.org/champion_4500_watt_inverter_generator_reviews.pdf
    • https://cdn-cms.f-static.net/uploads/4420939/normal_60164e55239ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xidazeze/zibo_737_avitab.pdf
    • https://s3.amazonaws.com/tikofaketonub/charter_spectrum_tv_channel_guide.pdf
    • http://gimuwexazopa.rf.gd/64739524706.pdf
    • https://s3.amazonaws.com/zuxime/bodmas_sums_for_grade_6_with_answers.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/35908624311.pdf
    • http://vobununebufipu.rf.gd/honorarium_crossword_answer.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_off0000e7a0.bin
6968118e81007a3b7f1a88a736af4e01460f4829a0ba9f5779c8291a1d5a9a1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 5520 bytes
font_01_sfnt_off0000fa63.bin
50cf0ae9c200e2492ccddd80ddd94daf405ad0b3f73b56a85a319de06d6466a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 11976 bytes