Malicious PDF — malware analysis report

Static analysis result for SHA-256 adea1447d8efba8f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 19:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3301a575901a9204c3d133d6157f9d7c SHA-1: 6006cc44b3d44c9c0282ec743c7e2cb3b51e9a6a SHA-256: adea1447d8efba8f00e35ed27a1a678fb43cdb2af66b62f67789a9fd1854e666
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable, but the presence of multiple suspicious links strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38e031789b---vaduket.pdf In PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/44711400191.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7b7caa8f8---2688330125.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/59618211647.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/51791261318.pdfIn PDF document text
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/vagipiwukuzoxalojoge.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a762a220362---30016783980.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/37kor855a9nsqq1oqtf74mo9oq/birugaxikuwa.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/93740448477.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/zogovodunevuxadipojisubo.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/feladavag.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/91f3179d5dac0c2dcda256a90a0ddb9c/rasudofetujo.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/tamonoziru.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gelebilawoxefe.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/isunci6hg1t00k5hfb4b92bm67/71401246348.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3fa0221f---31372709929.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-5/20210505111833801064.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///ramudukuzakebigorilemiwe.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/42102095194.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/wifopesuzesasutexotomi.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/75845365405.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a997551e317---ruxixodijagowebugopoded.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/82763763912.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/82549840251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=middle+class+definedPDF 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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 10144 bytes
SHA-256: c69f4be9c2e3f6b0b7d4a2f5be7ea5155069d492e4ec152e2697eea1130f8234
font_01_sfnt_off0000f854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 17608 bytes
SHA-256: c40d029362b9454e74f3aaf32744bb5b38a753615cb9e819828ee4fc68f4e8f1

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