Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f868fab8c9f7736…

MALICIOUS

PDF

86.2 KB Created: 2021-04-04 19:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976b8d6890fc64afea5b30d46f11dedc SHA-1: 6e8e85394417d7c9e1d7b43fc9ccbd8a38fb2809 SHA-256: 8f868fab8c9f77369fd009f6c07398a9ee719ae74d7aba50877db8ed69c20227
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 URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Sony str-dh130 manual'. No scripts were extracted, but the presence of external URIs and the malware detection strongly suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/aws?utm_term=sony+str-dh130+manual
    • http://itfamily.pro/bob_stewart_uniform_shop_bendigoadp99.pdf
    • https://cdn.sqhk.co/bedogipaxog/eggPhiJ/zepef.pdf
    • http://itactical.xyz/zozufudubajuwubokoxerofe97whq.pdf
    • https://cdn.sqhk.co/xinulezebi/XFojfTo/cruise_ships_still_at_sea_san_diego.pdf
    • http://antinomi.design/how_to_fold_total_gym_elitel5omz.pdf
    • http://monongzhlh.space/what_are_the_4_theories_of_management0m9yu.pdf
    • http://habercigo.com/12886394639jsynw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tukakuze.epizy.com/space_truss_problems_and_solutions.pdf
    • https://s3.amazonaws.com/vasofirida/allen_bradley_powerflex_700_manual_espaol.pdf
    • http://kinamanerat.epizy.com/isometric_dot_paper_free.pdf
    • https://s3.amazonaws.com/baxunaf/reported_speech_examples_questions.pdf
    • http://zirutabu.myartsonline.com/xugovatixoza.pdf
    • http://razogop.epizy.com/bhojpuri_me_gana_dj_song.pdf
    • https://s3.amazonaws.com/gawabog/el_vendedor_mas_grande_del_mundo.pdf
    • http://rorokepu.atwebpages.com/9576163391.pdf
    • https://s3.amazonaws.com/piwupevivotixi/line_of_symmetry_worksheets_4th_grade.pdf
    • https://uploads.strikinglycdn.com/files/cc12b241-5de7-4b4f-93c2-22ab3f3a9c30/92712122891.pdf
    • http://peruroz.onlinewebshop.net/habitos_alimentarios_definicion.pdf
    • https://s3.amazonaws.com/pokorevalaxex/ladina.pdf
    • https://uploads.strikinglycdn.com/files/657404bd-b563-4194-a015-d044755788c1/how_to_use_munchkin_fast_bottle_warmer.pdf
    • https://uploads.strikinglycdn.com/files/1924d5db-8b61-42ca-afab-2e64f2f2a31b/80309624049.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_off00010969.bin
a84f5e226ae773da6e90ed6101c53b9d1ce811f172f20c4e6b7fe7d447e5f2f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10969 5660 bytes
font_01_sfnt_off00011c8d.bin
c5bc2aca776b9de924aa6db65cffbd291eaccb4e0f25fe73465035209c55f3d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8D 14396 bytes