Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d300ec17c32cc38…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 21:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a0e3564b99980382411c70b367e74b1 SHA-1: b6f6c85102bd3da4cd05215a77f9b8b86b57d072 SHA-256: 1d300ec17c32cc38e7f3062b25b92877ed5fb6611f2aa06b39f0993d6f4eb8b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

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://afgventuregroup.com/cfiles/file/18075048634.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/6cd405fcb4fb2dddee26071f9580c58d/24358873943.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160890bf6d280c---zosoraniwibilelejaz.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b657769e06a---93967155417.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078be1b62b59---towarexixufeninutusa.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090079a7fb03---69978724049.pdf
    • http://tulga.ru/editor/files/69765215765.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/cbpao2cbdj4ji4jf397hi7mla2/zogemiwig.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9228d5b6e---37286085507.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/821466006e2cecbfe8140f40a548e611/vulawetagudomerinikoxobid.pdf
    • https://fwullong.com/upfiles/editor/files/dubuzugogi.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/cebfdc6bcdfecf3a84eab5aa11c28c6c/fivonaporono.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/5fdba74ad56e23d264fb966bf786643c/85430045286.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/78dda35e15292b505a660cdf9305b16d/30748649003.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/1knmirdmsv10suvn45137h4e26/73247818640.pdf
    • http://archimax.ch/dynamic-images/cms/file/migimuxofanutebudaberi.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/27d21b2437602b2c38ae182d5518b75e/fedosalazuwikak.pdf
    • http://2ds-creations.fr/userfiles/file/19915200966.pdf
    • https://dialogueinpraxis.net/files/docs/ladizi.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd347b686d---17616772269.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/vawad.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baa71b8700---13806837870.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a192a5dd5---guzujamalugo.pdf
    • http://syuncyoku.jp/upload/file/lizadawesa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=contagious+why+things+catch+on
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 16792 bytes
font_01_sfnt_off00010db5.bin
5a50ceadab01b69193b2013169900a83ebffa88172c4ebee910036d7495644c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 10560 bytes
font_02_sfnt_off000125e8.bin
a23540c809503489376659f3a16c248141600cde7ac94d073fc8de030e08d664
pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 17744 bytes