Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4da2275ba34045…

MALICIOUS

PDF

82.1 KB Created: 2021-06-03 04:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29ce16c26e8e60a462a7f2a4b91915af SHA-1: 7510282ac917737c3012ecc730cef7e977530288 SHA-256: fc4da2275ba340456bdc0acc1c4ee74448545592c06244958fbe2b7a6c1e3f80
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, characteristic of a link farm, and is flagged by ClamAV as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into believing they need a password to access an archive, which is a common tactic for malware distribution. The embedded URLs likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cructi.ru/pbw?utm_term=magic+partition+recovery+3.0+keygen
    • https://cdn-cms.f-static.net/uploads/4369525/normal_60525d976be4a.pdf
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/0ded6b.pdf
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/290cd23094a2.pdf
    • https://static.s123-cdn-static.com/uploads/4412773/normal_6006ff9f6fd4c.pdf
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fe82adedd780.pdf
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/zasakudujuredutaxo.pdf
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/5343954.pdf
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/gamujegoxagid-megigigolilin-gulajiwak-watelamawekedix.pdf
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/6184240.pdf
    • https://cdn-cms.f-static.net/uploads/4494661/normal_604a7e5b6fb5b.pdf
    • https://xinogibujijinak.weebly.com/uploads/1/3/4/2/134235465/sixejezomaze_kexudez_petenavuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8e852a6b-5809-451f-a293-e881ac2a1bbd/xavin.pdf
    • http://podimil.pbworks.com/w/file/fetch/144526149/60675234989.pdf
    • http://sejuworepow.pbworks.com/w/file/fetch/144419169/kenixujoj.pdf
    • https://uploads.strikinglycdn.com/files/29da3e4a-f5d6-4ce8-a4b8-9d4fd1eaeb12/seasons_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/f7834de1-1ca0-4a5c-8a3e-3a7476a1627b/30482806325.pdf
    • https://uploads.strikinglycdn.com/files/a637d44b-a24b-47af-a6f3-677e5c6bfbc8/betubijelosep.pdf
    • https://uploads.strikinglycdn.com/files/daecead3-df28-41e8-980e-d5e7b4cb6359/8979691524.pdf
    • https://uploads.strikinglycdn.com/files/e063f648-f5e7-4507-bbf8-2f605f79a9c8/dojepoz.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
    • 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_off0000ec4e.bin
c053ec1d879750ca35bc0029a7750dcb0ec4f58227990ed185ea76be7108de37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5460 bytes
font_01_sfnt_off0000ff26.bin
cfb3cbd1df0a6d276f19a120057e9fe95c8e0464ca010751497f4365a5af304c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 11412 bytes
font_02_sfnt_off000124e9.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E9 16312 bytes

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