Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefe64d67390925a…

MALICIOUS

PDF

89.5 KB Created: 2021-06-29 17:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 674de58d84be455473d18bac5209d056 SHA-1: 73231fdc39d5876674c3f32ed519136977e963d3 SHA-256: fefe64d67390925ab96f15d4ad378118fe633b87c976382945edfdbe07350383
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092030dc6e58---15801975383.pdf In PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/970b2a54dfa7c405c055502ee6090d7e/34619202992.pdfIn PDF document text
    • https://baongochoa.com/upload/file/50428364360.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad87090b708---35132134789.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/59309604230.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/bexepupere.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fc292a7c4d433ff7a48a55bc9840f2a1/74463500637.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/benexewapetexidatimaxan.pdfIn PDF document text
    • https://campermagazine.tv/public/file/80083657611.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/xisowapakudagivepudifop.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b2ddb60a4---5606711791.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/sukowanomovivanabited.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba75fa38a5a---tidan.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/saxagivenevevilozovuroku.pdfIn PDF document text
    • http://darec.sk/files/files/37785579584.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d361d355---fowuvekojelopubi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/83je7ba4rrc4vr3sqknsg7vvgu/2277878353.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c368f56a2c3---79093314949.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dddac250e---binebokaxazajewubegudix.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/u1v119tqktn4k04371i0rmi3kl/67927713379.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af335194f92---rikirozulifuzuwivexavop.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090900117656---bitateg.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083175b15af1---14940836269.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/omh58p1iure0ddt4rp7ksr0lg7/wuxenajaromajedisevowigib.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/31424061185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=arapaima+gigas+for+salePDF link annotation
    • 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_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A7 18440 bytes
SHA-256: 546791a223608ff88033276cdc7bdda8274cf7d14ecb92b2458af6c3919918ce
font_02_sfnt_off00013f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F77 10480 bytes
SHA-256: 29b68f3173f8ec4191976250073e5a8450ca569dbca2bf44ba715e1e701be955