Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8a2cb58742f55e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-08 12:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f80c945a7a3774476fc258ecf1a6a4 SHA-1: 5bf04cc5975bb5769ae3b5bf974b9da4df17224f SHA-256: 2c8a2cb58742f55ed0ebfec771a5a310e8e2e0f5682594375429416f2e9853d0
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 multiple embedded URLs, one of which, 'https://xezojetit.ru/123?utm_term=reporting+bullying+in+the+workplace+qld', is presented as a lure related to workplace bullying. The presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://xezojetit.ru/123?utm_term=reporting+bullying+in+the+workplace+qld
    • http://leftoutclub.com/54374376418gh6yw.pdf
    • http://sukujugonada.22web.org/96804856332.pdf
    • http://votixibutiro.medianewsonline.com/zupagepunimuluzizoxawiw.pdf
    • http://busimaderule.mywebcommunity.org/lolipower.pdf
    • http://nebuxopav.mypressonline.com/what_is_step_4_in_aa.pdf
    • http://gigogon.22web.org/taragusuzarajof.pdf
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/336e5345.pdf
    • http://fatemalitu.iblogger.org/amana_2_stage_furnace_manual.pdf
    • http://digitaloffice24.ru/82574754291zm4yb.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/de2736b80fa7.pdf
    • http://kindraretterath.com/age_of_empires_2_hd_fast_castle_build_orderjqbqu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jatoxat.atwebpages.com/21947268445.pdf
    • https://uploads.strikinglycdn.com/files/42205103-e446-4419-b58c-d83505a2ad59/jidavarawopowilaki.pdf
    • https://s3.amazonaws.com/fekazudabo/80817863903.pdf
    • http://gugikimu.rf.gd/browse_android_phone_via_wifi.pdf
    • https://s3.amazonaws.com/patotale/15114668489.pdf
    • https://s3.amazonaws.com/kiguteperilodu/mibukariv.pdf
    • https://s3.amazonaws.com/fenatagazise/alter_ego_a1_audio.pdf
    • https://s3.amazonaws.com/mubemutolewe/examples_of_broad_statements.pdf
    • http://mofibukuzoke.rf.gd/xariza.pdf
    • https://uploads.strikinglycdn.com/files/6f75bbca-615a-4afd-b0cf-129a3216087b/how_to_add_table_design_in_excel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db68.bin
38a0e56be9bcfc979ad07f365e6cf86356455c0e0133c04935741ff76c3eecbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 5572 bytes
font_01_sfnt_off0000ee5c.bin
c4bd53691083e36d66c6284e50cf8798d52fe8a5d92593efcdc5923bfed3eb5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 10276 bytes
font_02_sfnt_off00011136.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 4324 bytes