Malicious PDF — malware analysis report

Static analysis result for SHA-256 d754c5a5516daf10…

MALICIOUS

PDF

118.9 KB Created: 2021-07-09 00:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cec534df48735a6e73472cb832f04b9f SHA-1: da32695efd154f4666a5d39b745563cf26ae9270 SHA-256: d754c5a5516daf10a69bcf6fad7128fa0b20d765918a6a70f754fe5bd6c2c470
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no executable scripts were found, the structure and URL patterns are consistent with malicious documents designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://telegid.tv/userfiles/files/91976783629.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aef61dc460b---66139103027.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/majodatojak.pdf
    • http://caratow.eu/userfiles/file/jajivif.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792e95838c6---pupapabumuguzobatek.pdf
    • http://mofrantech.com/userfiles/file/72681923155.pdf
    • https://mdteam.se/ckfinder/userfiles/files/xufuxanotezadosi.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/phg0f7gr8trq2h9o6pp36a9v84/fezubilafugesifaxuvik.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608978942fb82---94964845669.pdf
    • http://fantalife.nl/userfiles/file/jakogufofimuvuxapenalivut.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/o6sedm4dnhcm1nff64jjnffndp/38538975816.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a53d9de552---56061149180.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/38385362194.pdf
    • https://securitydm.com/slicice/file/88214425207.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/631b16637077c1fded9e46f8ff26405e/mimepefovaja.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c981b04c709---52115639944.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd3fc163b7---govobasinibumuto.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8fc91585c---23403445283.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/i91ktafqlhi67qrtggknv7pk3k/silepuzaminoxux.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/2a2a67c74c7b3e23c51d1c0c290f474c/55346101053.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/28lrcq2u5pr3ttkap9nt551rsq/gekuresigad.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/rusakud.pdf
    • http://jullien38.com/ressource/site-image/files/66115966352.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=significance+of+human+relations
    • 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_off00016f5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F5E 16792 bytes
font_01_sfnt_off00018770.bin
723604464e5a8452e4e2eb54797309af95d662e8d451ff98a689dfd7219e1af6
pdf-font-stream PDF embedded font (sfnt) at offset 0x18770 17424 bytes
font_02_sfnt_off0001b4d7.bin
431bedf520885525481bbebc53140ba54819d05b85dd07150930c359678e839c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4D7 10960 bytes