Malicious PDF — malware analysis report

Static analysis result for SHA-256 e014d3ad1e5df34f…

MALICIOUS

PDF

90.2 KB Created: 2021-06-25 23:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fa3325a4e6718efae472cf8abaab86c SHA-1: 6e4ac865587e5cf8e16b8e89dbe56fdcb48c2d66 SHA-256: e014d3ad1e5df34f2d9912fd0b9da82c68c51ff924dadd680720110fb4ae15ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://memoservicesrl.it/file/viwesusexepaduvo.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/022ee58d2a35659f27a0d796c694069d/66455538440.pdf
    • http://viajesalaos.com/webroot/img/files/xolofedarajumivamem.pdf
    • https://szabobuszrendeles.hu/files/files/zeresuj.pdf
    • https://cvsc.co/userfiles/file/28116800529.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088fc8cb69a1---97799895595.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/2632195016.pdf
    • https://gamasteel.net/userfiles/file/23689858759.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/bc2402590a70a34a2586bc2b77d26c02/45627412229.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/27cbf53de016b1e55f67eff0e7409b01/nusofivivi.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/7764342638.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b8953ebca3215971fbdd95e382a5cd8d/mafapomavafabeja.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8eeb17df---wipitabamelidavopiwutig.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/085e4a9776be4583cfdb6ba17d163037/xoxaxivosikijovatovi.pdf
    • http://travelci.ru/ckfinder/userfiles/files/21258907722.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e2e6285e---xinulakiru.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b9f4d16686b10693b25321afcc6da5e0/68576724830.pdf
    • https://www.profiemg.cz/upload/ck/files/875726269.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089775b50eff---fikezafab.pdf
    • http://centralcogtc.com/uploads/file/naxap.pdf
    • http://vtvxm.vn/userfiles/file/lixuxilazogekojogovazik.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc948144f4---67169899059.pdf
    • http://finproekt-msk.ru/userfiles/file/medoravezifenumonejejipo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=smackdown+android+game+download
    • 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://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_off0000ff8d.bin
676aa5d44fef3f428151645a94658f968fc791d02a8abeae9714a567afc182a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 16684 bytes
font_01_sfnt_off00012b05.bin
0b0e0c13b8b35180ba7f665446138482dd289ac705f519da7746e132d4a7fc1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B05 10700 bytes
font_02_sfnt_off0001435f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1435F 16792 bytes