Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f570c317a152dbb…

MALICIOUS

PDF

71.7 KB Created: 2021-09-23 07:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3c02a99b4765af202d7662f2d062504c SHA-1: f701f12dae766b4f97518779aec59f7453b245c2 SHA-256: 8f570c317a152dbbfc4ab5ace4c4eb3f9a86ba7cc1304a82b0eb05d2a72b67ee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting it's part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or execution of malicious content, and the presence of external URIs and link farms are common tactics for phishing lures and SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=tick+symbol+copy+paste PDF link annotation
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/taxoxu.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/99501209452.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/wizuvopexufol.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/2721393688.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/71647337985.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f519dbe14efae8c340d6ee5fb8306324/40687945855.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/xuvojaxedezivadanezesib.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/mizajer.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/11877314895.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/51980701411.pdfIn PDF document text
    • https://alpinashop.bg/files/88855619069.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/44724bd5ce5cc454f1c991d4b7109540/dikexivereji.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/sagufefarovupizamuli.pdfIn PDF document text
    • http://aeternoplanning.com/ckfinder/userfiles/files/27768024495.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/wusipox.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/52216011880.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/58124418057.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85e29742e---80887958232.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/32253215851.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140729e219b2---55949425336.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/falesizupojudanugupututi.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/domezuxokar.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/77778549908.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210905173157_327887329.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/lidukadilumaje.pdfIn PDF document text
    • 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_off0000b511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB511 17280 bytes
SHA-256: 08f3b277dec6dffc758597cbae49c2fa253a25fb383f9485b33b3a05583d8205
font_01_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 10640 bytes
SHA-256: b6ddb4190ab0addbb13261e3ef5b3946442891ec217d4a5fd17f0250a70dcd40

Open this report in the interactive analyzer, or submit your own file for analysis.