Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c060daf8b3c14b4…

MALICIOUS

PDF

86.2 KB Created: 2021-07-17 23:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c89a2d903c70f11d6078aa35d282f8f7 SHA-1: 6a89a74ae3877fb5cb9ab3440788483bae00783a SHA-256: 2c060daf8b3c14b461981c2ef5670ab356b931087b14d98496a51d0bc8bdacee
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609589e0b1b66---gubapegotezijukapijud.pdf In PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/orjlehpj8sdshpr250uuv6vgvo/77682805490.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/40mb9frsbf8pmto5ktfpaqvu8c/35852544947.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/janunawalapos.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/sugusuzegifukejamawag.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/zebusatasubuzo.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/58259367597.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075896359643---38287703711.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/flmn15ukemjv7sni7rv6ngop92/fipomajesosuzatalemuvov.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a829396ea16---91556737072.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/furuwafatevixis.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff5056655---dikaliwup.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/12993546044.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba2cdc863---23070097373.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8b23c47f66b207d7c53fb977e1d181e0/52021573891.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e9d530ac9---14508363319.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16234808333412.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53eed24f0---titasubividimuj.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/buwofanobesenotogevi.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/2e830504q6fe9livausogfi3t1/77855017785.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/29m5vfvp6sd3t0a84acicc4oe1/88813422625.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/84470080550.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf54eb0900---65518504366.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/1d975ef808229d8648ff35023f222e9b.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=madden+20+college+teamsPDF 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_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 10756 bytes
SHA-256: 00a2e1c6870fc519b5a5b354ade1c809f472a450f569167e0996f65616d7567f
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 17516 bytes
SHA-256: d262dd4d663805c3927a1f78016e67d34991c2910fef52ce739d68c021c21fe8
font_02_sfnt_off00013390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1