Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2931fda1a3fe3c…

MALICIOUS

PDF

91.2 KB Created: 2021-08-11 01:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60a19f342c5a1176bd8907c9250f0cac SHA-1: 6e6bb810c33d2a8928003855b65add922fb245f4 SHA-256: aa2931fda1a3fe3c0ed3cf32dbcbadec68ebb97ee0dfc559934b91eac131d8b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://catamma.ru/uplcv?utm_term=what+is+weight+limit+for+forward+facing+car+seat PDF link annotation
    • http://pensjonatagat.pl/userfiles/file/zolatumutokunatikulu.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c10e6b6b3b---zufazawadujuvimonaridun.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/sabenumikevebizudozime.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/pazofel.pdfIn PDF document text
    • https://purefeeling8.com/data/file/nefuxakup.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/84933565929.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/83451081920.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16084d777869b6---keguvovaparurug.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/xovete.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/molofipabiniwokomase.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/65493177959.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/33496863088.pdfIn PDF document text
    • http://reflita.lt/uploads/files/xelabotuxamekiterup.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866575e201d---5362862061.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3219a2ce5---85464788249.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16105ad97de62c---roweturobivudivasoxomi.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/61b9679803779160b6223e5c298115c5/13861676790.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e21e7dfa9b---lafurijasugonigeko.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb774e2d87---malarafanokebitukima.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860a1fa6cac---59821780093.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0e9d4e1ce1da807f5a9138f55dbdb976/35123719933.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678db74395---52765532110.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb27f03911---36106331158.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qgt2erjn5jlo3m2ekqgklphs47/bewuwurupofosapezoj.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_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 11000 bytes
SHA-256: 7e501daa01afa05b704a0b8f269f823cf030f4af1efb81d46bb6fed9f1d7bd9d
font_02_sfnt_off000134d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D6 16356 bytes
SHA-256: 0d0674d021ad134a8a3f91804ae765841be04361347c90e0b161e93453b88761

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