Malicious PDF — malware analysis report

Static analysis result for SHA-256 5472bf0fbad272c7…

MALICIOUS

PDF

85.2 KB Created: 2021-08-08 21:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16da1cf5de317cb3377753185cd0d266 SHA-1: 1375b3c41daac46333217ec7dea2ff580e4becef SHA-256: 5472bf0fbad272c732b674b01bca8950cde579269e1c4917d7fa6f46f6c34889
184 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and a callback lure further indicates a phishing or scam attempt. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=hyundai+tiburon+haynes+manual PDF link annotation
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ff182cf91---14478947012.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b4e7dfc03eea91046fa71aba9a579af0/bojoxugudipoxawere.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a1c620877---nexivepurajutawojosom.pdfIn PDF document text
    • https://castel.ro/userfiles/file/zivovidanawudonovukuga.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/fifozejiwabudonim.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/dfc9295e9291051ddd377a8e50ea4227/33426899059.pdfIn PDF document text
    • https://immobilgold.com/file/renunefefasusuru.pdfIn PDF document text
    • https://inncredel.com/uploads/11986739888.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/a36191c3cef92db5d25f12c25944024b/87370175757.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607153ad8dedb---wozupezekirokif.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/81925219854.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e02acfd98---zovajukoxenisevaga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae87846c1fc---wumebokodefifekukedipob.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/h10p0mra0kjdog3srvlh5i2vji/56444544507.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/xolelune.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/44353438054.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/fsho2inv21b38sn2jrettuqoh9/zejemu.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/mknf2ul8u7bduj7fnsf7gttr00/45948859187.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/65555227579.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/0o8ip0inp37cknnn7qvisc30a4/lozasanisoliz.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6136cb4654---pemejefexadixekudufosilex.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/kijabitafudogozinopojone.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/poguvanil.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e0e94a73ee9915c61a59c5a336364f0f/98460928081.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/fesiserinedosutidezulijew.pdfIn PDF document text
    • 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_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 17708 bytes
SHA-256: 9eef7106518b53f03d6f2d656f243e2f9173e8bdc001f5df840c5c0526b3f7d9
font_01_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 10860 bytes
SHA-256: e1ec99a98566459553b996077e8445089af6bccb700e80fd2792a4c2b7fbdbd7
font_02_sfnt_off00012ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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