Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f345ce983318e4…

MALICIOUS

PDF

89.6 KB Created: 2021-07-31 04:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2136a94d6d0afd2fa322d56b0d0098be SHA-1: d6a3597195292be455e3acb108444d386d93e487 SHA-256: 04f345ce983318e430b80b5322aa91ff7db043ad2f5efdcfdc335f0504ed2be2
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to numerous domains, some of which are hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ketchas.ru/uplcv?utm_term=calendario+biodinamico+febbraio+2020+pdf+gratis
    • http://tekizolasyon.com/ckfinder/userfiles/files/polasebotavepukutidorefo.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/167af0b0ebdfca071a89c12e4f719ec3/74086011388.pdf
    • http://educasters.co/ckfinder/userfiles/files/wazinesasuxuw.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/jarepanakivemawoxegure.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/bisixixavumegodaw.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/8ici16kug7005lnk2pgp6ih5c7/36022256077.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/niruwaxuxedanagokefa.pdf
    • http://writtenmail.com/upload_images/file/gejinudumugatotenot.pdf
    • http://dush-kz.ru/uploads/fck/file/26831761003.pdf
    • https://haysalon.com/public_html/userfiles/file/4076580193.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ae8fe1cb7baa04f13828d713e44fec8e/9091723784.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c75cc97b---33357212512.pdf
    • https://eberli-medical-supply.ch/upload/file/73885027859.pdf
    • http://xn--b1akwe.xn--p1ai/userfiles/file/26654116628.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/02a49c098a8c4bdecfad3936b986f5b1/xesoxojamiroxik.pdf
    • https://www.alapan.org/fckimages/file/gorijeleta.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/iiqnr0r5825dna2j0fcq1se3q7/78503629416.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/t68el91lglbk8ikjoksquo2eh0/nifolepipiwidikakul.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071f4011f0a5---50267033343.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kinosefenasodapexuwudabuj.pdf
    • https://sherwoodchamber.org/ckfinder/userfiles/files/773176849.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8bb349a450703f18e0f8f019b122cb65/33449372312.pdf
    • https://chinese-wall.tw/upload/files/zelaronawon.pdf
    • https://ludifrance.fr/userfiles/file/renimazijiwomefiludubujif.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mdlskc2lckgmrppda5h7pi4sm9/fegafo.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/96757277791.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_off0000f46a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 16792 bytes
font_01_sfnt_off00010c81.bin
500e1bf522fbf5b5e636c38515575d6e569ad2ae4880ed398d86414c3b10d5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 11376 bytes
font_02_sfnt_off000126e2.bin
fdff1f097ef9eb94992136f505af58c60b54b3745cda2978b1c586b35efe12c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 18856 bytes