Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb163c485ec1bc2…

MALICIOUS

PDF

69.6 KB Created: 2021-03-28 15:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f8fa7c4751cf05f8d46153e02d30ed SHA-1: f4b256e1f6b9ade78432988b52878127a82fe471 SHA-256: 6eb163c485ec1bc26a799983c775eb16f757dc7ba38caab4270ce939adf60d3e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a book title, aligning with common phishing tactics.

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://soxebez.ru/award?keyword=atlas+de+microbiologia+cl%25C3%25ADnica+pdf
    • https://cdn.sqhk.co/kibukumivu/22heqI6/26206606010.pdf
    • https://cdn-cms.f-static.net/uploads/4412151/normal_6015fffe30267.pdf
    • http://tetupamino.mywebcommunity.org/jabivewedesod.pdf
    • https://cdn.sqhk.co/kumipexa/jbFihbg/murego.pdf
    • http://jisutuxoxaza.medianewsonline.com/abdullah_calan_libros.pdf
    • http://lnstagramverifiedsbadgeforms.com/70793460784aknc.pdf
    • http://sogejovep.mypressonline.com/24728303945.pdf
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5ff7ecd655b48.pdf
    • https://cdn-cms.f-static.net/uploads/4458827/normal_600c829b08494.pdf
    • http://you-bestshop.xyz/gavubigozikulad9tkoz.pdf
    • https://cdn.sqhk.co/zufutetuwume/VRXhihj/vitamix_5200_refurbished.pdf
    • https://cdn.sqhk.co/vokalater/ghOXjfV/diced_tomatoes_substitute.pdf
    • https://cdn.sqhk.co/bibolaned/K7jhgfu/walesi_bardok_kepregeny.pdf
    • https://cdn-cms.f-static.net/uploads/4383327/normal_60273d5f8ae0f.pdf
    • https://cdn.sqhk.co/kizafizutuw/jIV6YgP/99085748523.pdf
    • https://cdn-cms.f-static.net/uploads/4382779/normal_602aa0b2aff27.pdf
    • https://cdn.sqhk.co/tajudozizif/cgjkhgy/zikiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/11350c08-9bad-4f65-ae59-5904be35476b/when_i_play_this_record_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/68be4778-19a4-4df3-a7ac-613aa5d1a352/how_long_is_interior_design_course.pdf
    • https://uploads.strikinglycdn.com/files/cae771e6-e41c-4dd1-a167-d2d7f3968480/sennheiser_ew_100_g4-me2-g.pdf
    • http://jujobope.atwebpages.com/4082039524.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_off0000cd11.bin
90bf1bb5b88094573884d2ffab1a71414a2cde0204e9328d2adfa610b45747b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD11 5660 bytes
font_01_sfnt_off0000e03f.bin
974388f1dd6e7ac2e1263c60c6e581ac756ae5a27f716fb8c466a85ab1e3d37a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 12164 bytes