Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b2ccd704d9e1c…

MALICIOUS

PDF

84.3 KB Created: 2021-06-30 18:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5013c5aed0b0b73f8b93ee119f6e589f SHA-1: 23e093df299b201be5f9ffb9a015c018befc0a07 SHA-256: a29b2ccd704d9e1c7301abaf54dc7012de7e6d57bd6e914ec9fea70047b9a642
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS upload directories. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=clash+of+clans+mod+troops PDF link annotation
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/eb6b48a763e98a005049651b15504da8/28826656837.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/27208257103.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076821fd1dd6---9384945361.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/tibezerojaku.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/luzosok.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607468161d7cd---zujomana.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/39329061682.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/6uu11k0o55l26rqp91oco5o2l9/vexitazusalutox.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e06c3d4074---sakikuvetagemetitafe.pdfIn PDF document text
    • http://retailcop.ca/files/fofijizu.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/58959492090.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/e737636a712dbb9f665e7c089fe5bea9/soronewufovi.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/19298834363.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd930f690---53909108491.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/125fc7555a7540a9f6ee1a675cc585df/gosiragesuzokafi.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/gixip.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///pefesitafimiponu.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/taxumimevajedonav.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/6ce3bd2703f0d4a0e8c81c4f6603117e/36863708923.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/64628623913.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4c1d83cec---xabovudi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a238efd477f---jagezuretepivubolamuta.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abb39c618bb---kuxewiza.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/nizexeladeponakip.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/375383017.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 10692 bytes
SHA-256: bd98c7411c0bb33872e547c9ee96032c966116381a7af21d11570132943c6e6a
font_02_sfnt_off00011806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 16340 bytes
SHA-256: cf6d9df16faf0863aff85842caa3d0802f3bc630f07dbf0ea054ceb6ffb80bb8

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