Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae80109258f5414f…

MALICIOUS

PDF

82.3 KB Created: 2021-08-21 20:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cc76457e4debee804901fe5875f34e5a SHA-1: 97091ea48bfc65219963189b8a5190adf2f6c924 SHA-256: ae80109258f5414ff315bd80a5c22af7d13b6c27ab4536c3b1f3d0c732041366
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or phish users. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern, though the document body itself is heavily obfuscated and does not provide clear textual lures. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • 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://archism.ru/uplcv?utm_term=cars+fast+as+lightning+mod+apk+revdl PDF link annotation
    • http://kenshopvn.com/uploads/files/zufenedunavuni.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/90988013185.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2ume4v84j0tasb1l3hqplmoad6/fuvawofutosisuvozirixi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5212d1219e8ef7e7d92367ab3afa930f/78517497179.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/41348388683.pdfIn PDF document text
    • http://pinxedien.net/upload/files/xelinunurule.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/65013549728.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/miretapuvegetekuzejexo.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/10185824109.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/sapigorimo.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/96356773194.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/weviwutawutizuguduv.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb3ef25941---57999397805.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080f89baae8d---90402747769.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/9fc7de7d77e5f825dd003e3e2aa5f097/48383717675.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/nulolevesetorijini.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/9n4sg8s2em583891qii4cpi2s7/gujuzilawonude.pdfIn PDF document text
    • http://korytnica.net/data/files/jelajobavegasip.pdfIn PDF document text
    • https://petek.biz/resimler/files/46455725152.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/kivakefewolugepelowe.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/12686744852.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081911e5be43---bimawijeve.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030d04cec6---wawekufotimukowazobi.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/vijebaxuguwa.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/mewegawop.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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 11136 bytes
SHA-256: 17c478736099ed451f6dd77120c88f55b01553fae6892066e973e37e108c9434
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 16664 bytes
SHA-256: 2be2ec067a89a995dbbdc70bc5855b73824bf4b985ad5704da337af3b5e0597b

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