Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e418285863930a…

MALICIOUS

PDF

77.9 KB Created: 2021-07-18 07:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 624245fe84ebbf159f7fd342a39ba53a SHA-1: 6686bbdfb44a49ae0ada8ba9aae5e236c5948674 SHA-256: e2e418285863930abf1fa8ef6a97c35317606cca20dea21515188998b8e47074
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm or redirection strategy. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://ibshop.gr/uploads/_uploads/files/48095287982.pdf
    • https://hijaulumut.com/contents//files/36228278196.pdf
    • http://hanart21.com/files/userfiles/file/49418136145.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/45dfafeb274b6398b801579f067ee1a5/jelimapefifazu.pdf
    • https://kovtec.pl/eurostyl/photos/file/61920335904.pdf
    • http://theclubburger.com/uploads/files/dofapiborek.pdf
    • http://5m-tti.com/uploads/image/files/38291968507.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5c0f5292f---bebedetenofa.pdf
    • http://notarbrazda.cz/userfiles/file/kokokosokunasaxaz.pdf
    • https://attack.lt/images/files/87648412032.pdf
    • http://sarlampa.ru/upload_picture/97217677987.pdf
    • http://ciccioinpentola.com/userfiles/files/99326983530.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909d91b1caf---97230350770.pdf
    • http://rgn2u.com/userfiles/files/vevinefapinesonexid.pdf
    • http://motorlustor.net/userfiles/file/58294602284.pdf
    • http://atenngo.com/admin/sites/site/documents/sepununimexise.pdf
    • https://accuratesearch.com/userfiles/file/19169630838.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/228de6e4e52e7d05fc797b41a4591673/nenejixebomiwebususap.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6d1912b895da941ac36897a0411c1287/20577729434.pdf
    • http://aceonlinementors.com/userfiles/file/88026101081.pdf
    • http://drive4smilesquebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/buxamerogepavatoruvo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=aging+concepts+and+controversies+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://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_off0000cc27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 16792 bytes
font_01_sfnt_off0000e439.bin
b0f2e2ed9b64ee986995f91c880421b4bc537f79b80f76d97ece00cd9eb53d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 17496 bytes
font_02_sfnt_off00011179.bin
34790482f9f33e83e5ff4148a0981aebb32163adfc8f6d69d637ca893c500d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 10796 bytes

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