Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bad8462417b515…

MALICIOUS

PDF

78.2 KB Created: 2021-06-09 10:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d62745ffd550939df16b16ec1d1306a0 SHA-1: ee26287a06c79c2f75b9b02c116f4d2f7ba291c3 SHA-256: 36bad8462417b5156f19b37ea1e27436bd1890d5d0a3e36cc5c676781c106d0a
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to benign-looking documents, a common tactic for link farms. However, one prominent URL leads to a 'crack for 3ds max 2019', suggesting a malicious intent to trick users into downloading potentially harmful software. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' further supports this, indicating the document likely instructs users to download an archive and provides a password, a common method to hide malware from initial scans. The ClamAV detection also confirms malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://wastran.ru/pbw?utm_term=crack+for+3ds+max+2019
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fceeb8fbb4a8.pdf
    • https://ditowesoxuro.weebly.com/uploads/1/3/4/8/134885058/2662051.pdf
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/8045503.pdf
    • https://cdn-cms.f-static.net/uploads/4485710/normal_602c24a768f20.pdf
    • https://cdn-cms.f-static.net/uploads/4495997/normal_6010321b3c2b6.pdf
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/6918222.pdf
    • https://nosilagime.weebly.com/uploads/1/3/4/6/134613039/1577175.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/d237e29e1.pdf
    • https://bepupigo.weebly.com/uploads/1/3/4/3/134317889/sitakegigenewizez.pdf
    • https://vadenupajupav.weebly.com/uploads/1/3/4/3/134345777/3254744.pdf
    • https://static.s123-cdn-static.com/uploads/4483072/normal_5fdecb47b2216.pdf
    • https://bogidiwimo.weebly.com/uploads/1/3/4/7/134717669/2284174.pdf
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/dupemivumux.pdf
    • https://xirozakopep.weebly.com/uploads/1/3/4/7/134719339/0ee5ba1d644c660.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea7d0536-d5dc-4b78-9719-c48186f3665d/does_texas_have_safe_haven_law.pdf
    • https://uploads.strikinglycdn.com/files/695c5a68-472a-4bce-8de4-cebccd2bb028/how_much_does_a_junior_project_manager_earn.pdf
    • https://uploads.strikinglycdn.com/files/a9d99241-28f9-4dd3-95cf-34eb71f4a6b9/vufelobaderiponapif.pdf
    • http://xesimisejek.pbworks.com/f/windows_loader_2.2_2_download_google_drive.pdf
    • http://gosirata.pbworks.com/w/file/fetch/144914214/bully_penelope_douglas_espaol.pdf
    • https://uploads.strikinglycdn.com/files/3cd3462f-d2a3-4ce2-998a-81be9ab3a76c/what_is_a_irregular_and_regular_verb.pdf
    • https://uploads.strikinglycdn.com/files/bf7ed15a-612e-4a09-a494-e35ff6ecc55a/92429015502.pdf
    • http://sipibujewadu.pbworks.com/f/18741918078.pdf
    • http://faxofapuf.pbworks.com/f/neruruzapovirerob.pdf
    • http://tekitejug.pbworks.com/w/file/fetch/144541251/92315615110.pdf
    • http://pojaweku.pbworks.com/f/avengers_endgame_full_movie_worldfree4u.pdf
    • http://vakerul.pbworks.com/w/file/fetch/144510288/47104106498.pdf
    • http://masigali.pbworks.com/w/file/fetch/144898221/pokemon_emerald_cheats_my_boy_rare_candy.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_off0000ed9e.bin
1c31e249d2b21cfb38bac3379881102eb66e08558ef803b65f79b93681fee8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 5816 bytes
font_01_sfnt_off00010159.bin
a87e083a70ba6664de5365c4b8f989c24faf9c455e5d4e17c6a1fb7cc1eb9445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 12288 bytes

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