Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a68dcbbeedc6d33…

MALICIOUS

PDF

76.7 KB Created: 2021-05-20 16:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d928bf94a00283091087832a193a2865 SHA-1: 2eef64d06b4c77c6f241871104fce5f7a14a9ffe SHA-256: 1a68dcbbeedc6d3315cfff7ff38d860c589c54f3a82bf72d8717b85e70eddffc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Domino's pizza specials', suggesting a lure to entice users to click the malicious link.

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://golowaki.ru/strik?utm_term=domino%2527s+pizza+specials+this+week PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368494/normal_602886ad91c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_605c2bc8d4031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_601d7bf2df189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_604acf48c1b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_603971c29fa6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5fd99abe4e8c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387060/normal_5fee91d3b006b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe40596-122e-48c2-8e0c-fcbb56e69f53/pigose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc8c416-ecf0-4efd-8d69-4f4400f66341/xetilukemipitituworomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6417e7-0f67-45f9-9903-f856d6e188ca/effective_communication_techniques_for_couples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a330917-faaa-430a-85cb-4d195dc004f6/how_much_do_unacademy_educators_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a818a85d-31cc-407b-96a0-9e89f198f9c3/foreshadowing_in_act_3_scene_1_romeo_and_juliet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04fdef7-5402-4c22-8481-41b8e5d05000/dlink_router_dir_655_firmware_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7744fb-624c-4ba5-9bda-89274de0fa01/muvofutimiwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b46881c-daed-4859-9495-6ae6f822145f/bissell_powerforce_helix_turbo_bagless_upright_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d285c5-6f1d-48fa-9e87-a0e7d5bb7de4/88557136231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17795dff-7369-4458-bfc8-6327adb409c3/46581634621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d328b4-f1a6-4bd7-8918-5c4b34687a68/32293014248.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 5316 bytes
SHA-256: b4c266efdd30fbecae5fe33a4e988ea890ec48c854028480a163b5ade7714984
font_01_sfnt_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 11672 bytes
SHA-256: 4da0baebdc0189fdfdf1c9a7966f602edd83d8c36870d0f8196389876c3823d9

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