Malicious PDF — malware analysis report

Static analysis result for SHA-256 f372014ca209fcbc…

MALICIOUS

PDF

85.5 KB Created: 2021-07-03 02:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7259d36da275e3aeea6c75ddc7cd48a SHA-1: 14f6002e60bef455001505e216e124e3ce777439 SHA-256: f372014ca209fcbc7fb1d81d60bb0384e64ef4642118d20a5b1cc8910a446e7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution tactics. No scripts were extracted, and the document body was unreadable, but the heuristic findings and URLs are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/30627a6a62f15d88136092c7d8f6ef6a/69110503881.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/dbc2f890164260ac01f62ec79637dcf8/77776120242.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16099d6f8138fe---berud.pdf
    • https://ebooksweb.net/files/file/82491437060.pdf
    • http://somogroup.vn/ckfinder/userfiles/files/59211453635.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bb621f4d345d79327a4313755bf2d2b4/66156579836.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16075bbfdb5fb4---gozubibireg.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/sed42horjoofp5qjrhblefivd5/16447352884.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160878a7f4bb50---xoxajinupezisixubogiwu.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5a4be6af5---tisimofefafitukirobanup.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a23ba4976---20129875857.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160913d7da9784---saperomegik.pdf
    • http://rudolphalexander.com/uploads/files/rutiw.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae025e186c---ditolegenixomidakojonimuw.pdf
    • https://asi-filter.pl/files/file/vidadomutewosifuwura.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087d26d8988c---59305289815.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa2c6cdef---84091056652.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/vlimbkaina807at1uiijvlu5ac/medavubiketugixi.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/5051597889.pdf
    • https://majorsagilekvaros.hu/uploads/file/zilojetujugelaxaw.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/1dpm3n2tf5a76hgf10837o07oj/gesofipepebep.pdf
    • https://xlspandoek.nl/userfiles/file/zagugulibimu.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/1de9cc27a9e121bb93c43829c171036d/88418286227.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=cloudfront+301+redirect
    • 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_off0000ea26.bin
3552677710fa488154aaabc4e6ea0ba61a7e8ad9683262af18916aed2c1922a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 10616 bytes
font_01_sfnt_off00010294.bin
35e8f2c99c87155ed255a3e91a15d8b3693419ae2c5872698fd91b6f6a3b6530
pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 17636 bytes
font_02_sfnt_off000130cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130CF 16792 bytes