Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee4e99ceda3ca1…

MALICIOUS

PDF

82.9 KB Created: 2021-06-25 15:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebe40287ecabe40c21acfedd1d454a9c SHA-1: 73942c3eb198c135c1e4b99d5370d310915dc1eb SHA-256: 0bee4e99ceda3ca15aa37d913b5bcd7324ba0b9b7294b49a837e4e3710ac9a25
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The PDF structure itself appears to be a lure, with no readable document body content, further supporting a phishing or malware distribution role.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25affbf4a6---54863512293.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608130ab9da0d---55817001188.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/66636c31cc20178111b9aaf334e56c51/4202498812.pdf
    • http://chi-kara.net/userfiles/file/devixozerizeze.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e184c65ba---binozatukediloz.pdf
    • http://atenngo.com/admin/sites/site/documents/defininav.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b92605b0ebab425eac3c4fb66600afe/46842351588.pdf
    • https://carparts-fixture.com/file/file/49893522324.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/0bf8c0be1a5301bc3a76a894536e1110/65259054179.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a50b77cf19114f207c064db5c7b5c16d/lutifedofewizebuk.pdf
    • http://mygiftltd.com/userfiles/file/lewokokolebinol.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b9b702b3c5aa23b72e8559533882f983/61093338214.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0ef2e169a---sizejumazag.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608c472728963---mosezazerapidimu.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/5f9483fd350ca971bebe4781b9478cc1/xilidig.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3c7ac9bebbd56a6b91be3d6a035bfb2a/fagoxikexosasuwej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mussels+over+linguine
    • 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_off0000e21e.bin
442c72923f0fd49aefcd18e22cb44508c0a0d9d1a4ae90d703d210a86f1aef7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 17408 bytes
font_01_sfnt_off0001101b.bin
e5a3db16602e94c0ad410faaf6eee68855075f4872a9933c2ea6fdf63e6a6322
pdf-font-stream PDF embedded font (sfnt) at offset 0x1101B 10180 bytes
font_02_sfnt_off0001270d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 16792 bytes