Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd25e0300a07df7…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 01:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b99e69c1c6c6b4aa94169add8c82b6b0 SHA-1: c6d6361afbab00b890ae1c23429dda74388f450a SHA-256: 6cd25e0300a07df75a997a4f93be5e7b4c9c6fe0790864c817660bbb798c4187
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains. These links are designed to redirect users to potentially harmful content, aligning with a phishing or exploit delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd47679c582---lawufezupanokejive.pdf In PDF document text
    • https://curewelldiabetes.com/userfiles/file/xemaxidivusaga.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/b38cfdfaf2f5bc8cb4d10ae3e25129d5/94978866005.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210715133507.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8afd92df5---kekipituzejada.pdfIn PDF document text
    • https://manenshop.com/upload/files/11026182468.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/vofafeziret.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/45b94dd63efbfb5ead9f307078f5e2af/roxome.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/27866849736.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a5d75b4387696d6ba2760287e5d00c10/noture.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b924dcc6f6648ed6868ed5bebf7f76e9/41064811301.pdfIn PDF document text
    • http://vhz.cz/user-files/fuvewudut.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/jv3jgb5kk2q7uq4a6mrh7oncsp/99493536592.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/23070212097.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/g7vn751f0crm52466l6s86d11g/wobokosar.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a4d8df0dc---sejifokunigesoda.pdfIn PDF document text
    • http://whitebearlakeclassof1970.com/clients/0/05/05755deafc47004aae723e515cf08a6f/File/zamewakebefajumajije.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210624044528_07ggte.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/xuvezutotamofeso.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/66472607913.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9349c747c485d26f4ccef5882c1728c7/94262110699.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/negagupupevijofuwotev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=siemens+motor+price+list+2017+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_off0000d7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 17696 bytes
SHA-256: 3b54368188d0813766e5cf4537962642cb49275596cc1d665194874541589ebe
font_01_sfnt_off00010583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10583 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 11040 bytes
SHA-256: 5098aa5dc275616d9e245b066cb9e6124b4edb5f9d6d84441082fe18fc860d02

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