Malicious PDF — malware analysis report

Static analysis result for SHA-256 feec538393ca5e7d…

MALICIOUS

PDF

89.5 KB Created: 2021-08-14 17:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1077585519b7ea6a3d14262a7acb40cc SHA-1: 8af72572392bb98100f1e6e3cd409d73d46d5ba5 SHA-256: feec538393ca5e7d297a17ca94943291629c2481335e90da9f2de2b9d300ad09
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. It contains a link farm pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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
  • 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 http://uni-farm.pl/ckfinder/userfiles/files/43436044009.pdf
    • http://kibunajcc.com/ckfinder/userfiles/files/dukavarujufijux.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/78fa3c2efb2f588d4a8cd69b760040c7/85706725729.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2118f8ca32---76086714946.pdf
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/muxexotivamuvufes.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e111d5fe9---37608459645.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/202f3085320cf2ec299c3e5b11cbf518/59601668047.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/mn5osr5vuh4mhcv9vs4bk3g4su/35306968318.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f45463b77e---35693100110.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff98e68270---xetikevagogube.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077d7a9686fa---lopukinosetesigaxo.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081e258a6f1e---wuxolinatidazorinivi.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cffac50baf0---16198718177.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16116e5d05036b---65467381688.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a05cfbbee0f---28089762922.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0835dd545---70162469200.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5379f00d5---3088429862.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/53f62b0a0b37f2dd4a089cbdbd932931/13233703030.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfdda92ae---92156543386.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e92abff9e---delowusedi.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/vqlfjqdt1q9mbrcc3div0h6b70/92013410101.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/v896op456eu7mpe8up1tl3i0j3/43931074836.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/62f26bdd705eda92be79f0b5c9e1eafc/zafegigosidojalalut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=convertisseur+pdf+vers+word+en+arabe+en+ligne+gratuit
    • 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_off0000f5e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 16792 bytes
font_01_sfnt_off00010df8.bin
6243d8cb2e65a274432456c1c410c6f174d9f2ba4b67a91d8c49f24db1419fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF8 18588 bytes
font_02_sfnt_off00013cf4.bin
c89c790fc5293f1af90a9db5af2f0e1920552d00a2747990678cd8545e643e77
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF4 11096 bytes