Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8ee9e9277a45bd…

MALICIOUS

PDF

119.2 KB Created: 2021-06-30 04:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5226df25e2342b455a7f4da609411848 SHA-1: c4e1703979e2b7ce3c1fe393b1c261a892d94771 SHA-256: 2d8ee9e9277a45bd2c34e9b19afa6f43d68a01ab8ef7165178a4593bbcd04def
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608da2630a3e0---33084183897.pdf
    • http://93564497.com/userfiles/jijagisotazuxavujutiwir.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/88678080011.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099561f8fe75---16102106230.pdf
    • https://ahha.az/userfiles/file/59260723665.pdf
    • http://konsultacjenaukowe.eu/Upload/file/vakikibelikinodubaxu.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083f35abcb35---bodetofudaruxubudo.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/zozuraluzixuf.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01982f300---navemowozafexuvojavanif.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/msj2jh402rdqvube3ejhbif331/pufixasorikepenuzedevoro.pdf
    • https://sy-tech.eu/file/bogagoxiwexidimoxeduw.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/5v0c3jt8ucvpicrfe3mgk6431d/91816427670.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/d80b9ts3mp6rq1dsns2hg8q26c/59114325107.pdf
    • http://altelaw.com/uploads/image/file/sofopawagijorex.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/xagezokoxedewupabone.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/79mpk5dh4urqlb90qqffmegd70/nenosupivunon.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f3335b611---96009481538.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c274d0bb8f1---relojulupev.pdf
    • http://munsusa.org/userfiles/file/20210526192151.pdf
    • http://studiomistretta.com/userfiles/files/5697790504.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3ad009400---guzudoxosanu.pdf
    • http://antoniolescio.net/userfiles/files/vozagi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=bad+taste+in+mouth+white+tongue
    • 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_off00016c20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C20 16792 bytes
font_01_sfnt_off00018437.bin
22aff3698834c3354c02294499bf5f6fc5cd693cfba9238466b31fa8d870ce89
pdf-font-stream PDF embedded font (sfnt) at offset 0x18437 10788 bytes
font_02_sfnt_off00019cb9.bin
d613f02cbef27ab3a17651de2b7490ed800bee7c8d1f659881381193b3b66835
pdf-font-stream PDF embedded font (sfnt) at offset 0x19CB9 18588 bytes