Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d232ec0e5e86773…

MALICIOUS

PDF

77.8 KB Created: 2021-05-01 03:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068e6d4f38c2d278e0777043b0436776 SHA-1: 4bb3b2c0afbf1e06ec0b3585819bd44a8483bc6f SHA-256: 1d232ec0e5e8677387b21f192f9dfb2f1b8885754562580381a2ed1d7023d097
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'two phase simplex method example', likely intended to trick the user into visiting the malicious URL. The ML classifier also strongly indicated maliciousness.

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://dafemum.ru/strik?utm_term=two+phase+simplex+method+example
    • http://zobotalemogi.sportsontheweb.net/98566657446.pdf
    • https://static.s123-cdn-static.com/uploads/4481841/normal_6004fa6f06348.pdf
    • https://cdn.sqhk.co/mazinatefoso/1pjiIjj/42301916692.pdf
    • http://relax35.ru/windows_10_keyboard_shortcuts_edit03tu1.pdf
    • https://cdn-cms.f-static.net/uploads/4379362/normal_604806811accb.pdf
    • https://cdn.sqhk.co/jobiwokojo/9JKgjia/rogomomizivemeguwamap.pdf
    • http://fruitnaturs.space/49580270076l0s1w.pdf
    • https://static.s123-cdn-static.com/uploads/4466140/normal_5fcbb81de015f.pdf
    • https://static.s123-cdn-static.com/uploads/4368999/normal_5fece6b1350fa.pdf
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5fe86cbfd4ff2.pdf
    • https://cdn.sqhk.co/rudugebakivo/bggcjgQ/dvd_netflix_queue.pdf
    • http://coolstudent.space/masotilolopejosupikodigd3qe0.pdf
    • http://salimom.mygamesonline.org/69494098217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_b691bfe57d6f43218e13c7b54a147944.pdf?index=true
    • https://s3.amazonaws.com/piradi/how_to_write_a_counterclaim_in_an_argumentative_essay.pdf
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_d82f36e9766f481aa1ded51c1278b44c.pdf?index=true
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_79c2225e720444689d95d80ef3be939a.pdf?index=true
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_066160aefe92427883fa70d4a306c343.pdf?index=true
    • https://s3.amazonaws.com/tajimipojimo/roland_td_6v_drums_review.pdf
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_ce219ea9295c4a8fa0dc1fdf4f58433b.pdf?index=true
    • 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_off0000f3d5.bin
514d78d8dcc16c1d7ecb07cdd25970bfd79acc0752377eaa27b9bb7098334233
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 5212 bytes
font_01_sfnt_off00010580.bin
b30fb75e9df5d74e9572381f0cfbddf0ca3881663a6ab79206a6f6072bdd22bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 10564 bytes