Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c49504b46d70927…

MALICIOUS

PDF

131.8 KB Created: 2021-09-07 17:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d5509c1603c415911dbae6c5ab17f2a SHA-1: b89a2223be489af25c375e82680aefc1b4d7cb6d SHA-256: 0c49504b46d709278052aa84edc05e368c1b6157d73a189b0f5b56efcb18ca0b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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://lulanjina.net/upload/files/bivasojejabuverenon.pdf In PDF document text
    • https://leganordavigliana.it/uploads/file/75268921277.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/badivit.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/xetogiriserisaperofimo.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/rajujos.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818fb06cf6e---revulatovopojamobesalog.pdfIn PDF document text
    • https://deepex.hu/hirek/files/xikapigadejanokebunodi.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee19bd55f90---vanuw.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/lajali.pdfIn PDF document text
    • https://aitalk.vn/upload/files/siwaloxeb.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/belaxiwapojorakaguge.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/17391252862.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/11453079115.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/zibanigidizi.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09a512be9---vemitamisoriposobezajefaz.pdfIn PDF document text
    • http://envigest.cz/upload/file/jilojegawuwizolelego.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/6758146344.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/bccd731ec77d9293c4d413414ac03926/xibiwo.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/704e9646d7005270747f22a16b806f5a/wonapexav.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/xikave.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a704e10e08f---tudugowoxaburix.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6abe77dd1---levedugu.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/7dca79g00o5cd4ai9h5dcvl363/2526825211.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/5bcbjc2g2fmq416sgc0fioj61c/laramufebirefonesimoso.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210831121526.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/66958774852.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/zuvutagikotonud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=poaching+wildlife+trafficking+and+security+in+africa+pdfPDF 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_off00019de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE0 18316 bytes
SHA-256: a4f78394e0aa7ac82aeb80432d6e48c010c55a0dfd2eaeadf73a5ecde7482fcc
font_01_sfnt_off0001ce1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E635 11292 bytes
SHA-256: 08a77f5be091d605cf4451ee01587d8041ea562ae37f721cbfa63e6ef5d1e980

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