Malicious PDF — malware analysis report

Static analysis result for SHA-256 890ff3c801605295…

MALICIOUS

PDF

86.3 KB Created: 2021-03-09 15:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdd2a1af6ca1456dc4c5cc6f73c6cc7b SHA-1: 77035a2a0132950d1491dfb41250ba4c3f88c3e3 SHA-256: 890ff3c8016052951a5e73ef9cd14e2ce3a64ab060d55ef5ecfc632de22c4ed3
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. The embedded URL 'https://jumiwimov.ru/123?utm_term=threat+awareness+reporting+program+army' and the primary link farm URL 'http://roskycnmx.com/vr_dead_target_zombie_intensifiedot1lx.pdf' are the highest priority IOCs. The document body, though heavily obfuscated, suggests a lure related to a 'threat awareness reporting program'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/123?utm_term=threat+awareness+reporting+program+army
    • http://roskycnmx.com/vr_dead_target_zombie_intensifiedot1lx.pdf
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/varezo.pdf
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/2683604.pdf
    • https://tajezutudod.weebly.com/uploads/1/3/1/3/131398094/gerigarixizip.pdf
    • http://kindraretterath.com/jazz_piano_lessons_video_downloadz4zuh.pdf
    • http://zoomita.fun/family_tree_design_printableajd10.pdf
    • http://namedaun.fun/bmp_badge_softwareln76a.pdf
    • http://potuxoposutu.medianewsonline.com/how_much_does_the_ace_personal_trainer_exam_cost.pdf
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/6665238.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jozobudesurarab.onlinewebshop.net/sazuvolopalipakola.pdf
    • https://uploads.strikinglycdn.com/files/a8ba9848-70b4-4d3e-8bbe-4be94897368a/ropib.pdf
    • https://uploads.strikinglycdn.com/files/429a9929-271b-454f-843e-4ca7baed7225/rofafasavixavuru.pdf
    • https://uploads.strikinglycdn.com/files/9b92fa0b-b2dd-4ed5-a50e-479b141c4615/68387306943.pdf
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_8d54914aace44cac9be9dc11a2405e85.pdf?index=true
    • https://uploads.strikinglycdn.com/files/471029f9-1c09-416a-a82c-9d3a9aac7fba/zifinoban.pdf
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_17804404d9274ca5b088e8dd0084f2fe.pdf?index=true
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_fe826a10f1c0485cb1ab897e44175313.pdf?index=true
    • https://uploads.strikinglycdn.com/files/69f184f9-9b8a-419c-8e79-159658a34791/rabunedoxudafona.pdf
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_eee82c6698144c818b11b7b7355c3725.pdf?index=true
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_3a5eb942cfd94c6f84d9e7b429df5b51.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2c.bin
d9a8cde3bca584c693d1c0e6a33919dc70cdd9bb4c1144d3427d4a77cac5511e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 5344 bytes
font_01_sfnt_off00010f47.bin
d4cee6e9404731c6454096d80855b522d33218bcc114ec22cdfe147e6de9550c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 11336 bytes
font_02_sfnt_off00013638.bin
f04fb96856fa86c99babb5bf309615b780632e07d2318923ed038a7bfd4fd4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13638 16204 bytes

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