Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f6c72900dc24a2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-08 07:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf0df71104a28ad841c1501b5f7f76c1 SHA-1: 1e817ea2d448846f5983493dafd523ef5059909e SHA-256: 44f6c72900dc24a25337010e50015ed0f3932ad38745e33d03bfe1d90b34b4f3
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDFs, suggesting a link farm for SEO manipulation or phishing. The primary malicious URL identified is 'https://jacksth.ru/strik?utm_term=money+cheat+code+gta+5+xbox+360', which is likely used to deliver a malicious payload or redirect to a phishing site. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_URI' strongly indicates a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://jacksth.ru/strik?utm_term=money+cheat+code+gta+5+xbox+360
    • https://fogenidu.weebly.com/uploads/1/3/4/3/134391000/1e53308058ef.pdf
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/9895036.pdf
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/nebijujo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c52e026-2dd9-4548-8a58-8218b002025f/9428194411.pdf
    • https://s3.amazonaws.com/muvemasoxaji/20839878198.pdf
    • https://uploads.strikinglycdn.com/files/ec26a949-619b-45ef-a106-e3a515a7bf4d/navy_seal_training_documentary_class_234.pdf
    • https://uploads.strikinglycdn.com/files/b1ad0281-9500-44f5-9f11-af5261b0fccb/dezov.pdf
    • https://uploads.strikinglycdn.com/files/4a3244bc-4b57-4c38-8094-b3fd45e7f150/ocarina_of_time_manga.pdf
    • http://xupasafagimi.rf.gd/windows_10_1903_may_update.pdf
    • https://uploads.strikinglycdn.com/files/b4eb1cc6-5813-476a-942b-022a53c5ebae/dufifiseva.pdf
    • https://uploads.strikinglycdn.com/files/b52aaa69-83eb-4788-8e7c-7180a90a4121/solid_state_physics_meaning_in_urdu.pdf
    • https://s3.amazonaws.com/boxalewijim/minority_report_hd_dual_audio.pdf
    • https://uploads.strikinglycdn.com/files/a3da54f1-17d6-48d1-be2d-c95fad3b2b2d/juneki.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/vabuw.pdf
    • https://uploads.strikinglycdn.com/files/c2bb8bee-74aa-4c1b-9a67-7381b97a8618/68037157585.pdf
    • https://uploads.strikinglycdn.com/files/fd7d6e13-83c1-43f4-9f7a-29d2d1c1ac63/how_to_connect_my_phone_to_goodee_projector.pdf
    • https://uploads.strikinglycdn.com/files/9b0a69b1-562f-448d-8f19-c105cf321ce0/how_hard_is_aws_certification_reddit.pdf
    • http://wofofuzumoju.rf.gd/97889234234.pdf
    • https://s3.amazonaws.com/kelukakeb/spectrum_cable_box_says_acquiring_application_information.pdf
    • https://uploads.strikinglycdn.com/files/fe4d1c88-bc68-4ff1-9eb1-8a552c2a1ca5/fuduramobelemekumixeme.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_off0000ded6.bin
2a9f536ef75d463ecee29296739e027e764983d6ff3287508dba60fd43c5f7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 5796 bytes
font_01_sfnt_off0000f2ad.bin
e030392f78d5d39c3a9d86812aff27973445e7fd33c5b497b2decb2a81481395		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 10376 bytes

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