Malicious PDF — malware analysis report

Static analysis result for SHA-256 43971345f28ba3e1…

MALICIOUS

PDF

85.1 KB Created: 2021-03-16 21:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b80731458c68e2bfc5d27560911f9eb5 SHA-1: 2ac1d3af617396379ae193c6d093794d643acede SHA-256: 43971345f28ba3e1af90f48cae782b4b0ed8186eb4b3f4e92cac2bf0d5befc80
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain that appears to be part of a phishing lure, using keywords related to passport applications. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=new+passport+application+form+pdf+format
    • https://cdn-cms.f-static.net/uploads/4490138/normal_6022c917746b8.pdf
    • https://static.s123-cdn-static.com/uploads/4402501/normal_60089cd17c714.pdf
    • https://cdn.sqhk.co/kefesizo/HAidQie/4runner_roof_rack_tent.pdf
    • https://cdn-cms.f-static.net/uploads/4388626/normal_60216665d0fc1.pdf
    • http://togaxifobuf.mypressonline.com/bank_exam_today_english_grammar.pdf
    • https://cdn-cms.f-static.net/uploads/4384821/normal_600c02877c8d0.pdf
    • https://cdn-cms.f-static.net/uploads/4423460/normal_6027082505644.pdf
    • http://bimonetejatoleb.mygamesonline.org/sereredosupesuk.pdf
    • https://cdn-cms.f-static.net/uploads/4502268/normal_602afbcd37a01.pdf
    • https://static.s123-cdn-static.com/uploads/4483346/normal_5ffc26db1d5c4.pdf
    • https://cdn.sqhk.co/vozeseseber/gchebgh/granny_barbie_mod_menu.pdf
    • https://cdn.sqhk.co/nenuguvan/dUEaNjc/lanaleje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xoxaneral/jurnal_bilangan_real.pdf
    • http://segurixuzek.myartsonline.com/70_761_braindumps.pdf
    • https://uploads.strikinglycdn.com/files/f0e1c4dc-38c6-4687-87ac-b5804bfdb221/tuverolepaxusafovufug.pdf
    • https://s3.amazonaws.com/loneminovu/hunter_gun_killer_game.pdf
    • https://s3.amazonaws.com/mixanaz/case_interview_secrets_ebook.pdf
    • https://s3.amazonaws.com/gozifep/sugipufodobawumabugopif.pdf
    • https://s3.amazonaws.com/kigavanus/bollywood_whatsapp_status_song_video.pdf
    • https://uploads.strikinglycdn.com/files/223e6086-4c11-4e14-9964-461abd8a8023/cant_unlock_wd_my_passport.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_off00010ba8.bin
c00d30dbe63827b9bcb2b9e19b70405523c4ad2b67504e379666d4b5288f3ee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 5364 bytes
font_01_sfnt_off00011de2.bin
3ed191cfbc8d46546146878c49c78ea3aab8d1f7c0527606c34d07efa2bc186b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 11636 bytes