Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f33b5c0cb60a7…

MALICIOUS

PDF

89.4 KB Created: 2021-03-22 01:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff685bfcac8d73b7f640cd792116d3d3 SHA-1: e0b62c97affc3a95e27ccf9d596245e60f31e12f SHA-256: 6d0f33b5c0cb60a7aa7963b5350e7fddaafd6d5187e5baae278369f7c6399d1b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent to trick users into downloading further malware. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=keller+dovetail+jig+1500
    • http://themarkuzmusic.com/gagurivoxadavurogin7frc.pdf
    • http://flowerport.store/niwuwolusavarasovixajiza5fylb.pdf
    • http://gnfcns.info/92817875066qde6x.pdf
    • https://wujabadatudipox.weebly.com/uploads/1/3/5/4/135400083/5935948.pdf
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/xoripinanilap-mulavurefo-jenogosed.pdf
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/c2d1780e30f7.pdf
    • https://nimudizovif.weebly.com/uploads/1/3/4/4/134478886/4ab9bd5f510365.pdf
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/negiminapujitaj.pdf
    • https://fozonened.weebly.com/uploads/1/3/5/3/135326763/8438713.pdf
    • https://duzikasaropofe.weebly.com/uploads/1/3/4/4/134489835/dimide.pdf
    • http://adr-media.work/juxunnuqwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca40c778-f4a4-403a-9faa-1ea22e74bd7e/7404040369.pdf
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_0e81801c42774e22945045b84810fd05.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0adb22f5-76c4-4b44-9641-9be0e0966f27/20302093267.pdf
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_7f3e7db946404d18a7598bafe09545d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1eb72d0e-b19f-410b-ac0f-5cf73233529b/gagusijepoduteta.pdf
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_b164b12f594d4affadd29c4cbf48cce4.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_7868a1752a524bf999059ac812d9dea4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4141588a-2d0e-4fc4-af63-7f22d0692266/what_are_the_protocols_used_in_osi_layers.pdf
    • https://uploads.strikinglycdn.com/files/c1a526fb-27db-428d-9ccc-cdac80284af1/tawomazabudat.pdf
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_03d68403955143f88819795d5f464728.pdf?index=true
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_4ec525f7aace4d40a0d23398d5b35a90.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_off000106cd.bin
bcaf8d359c30262bb3b5fc54ae086e25fbe36e0f58da6265859725b424d86825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 5240 bytes
font_01_sfnt_off000118c2.bin
b91a6998526c8bde314d8d58d5f27822944d1f99ee1104012c5dde93dd2c0aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 12156 bytes
font_02_sfnt_off00014232.bin
684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14232 16376 bytes

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