Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3ae8c07520272a…

MALICIOUS

PDF

74.1 KB Created: 2021-09-08 11:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 048cda57a2ab6a83ff5ef5a4c7694e71 SHA-1: 8c9add673d18036daa037fe15985ab086bb40c1a SHA-256: 7d3ae8c07520272a7e6cddb8e4dc7ca3f0867ed3165f5bacda80eee2e2bf094f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://wastran.ru/uplcv?utm_term=malayalam+quotes+about+life+pdf PDF link annotation
    • http://pmke.cz/pictures/files/pagevetasawaliwulifumidov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607755df94dab---16508329302.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/xotegusebetugisafaxigaxu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08d3b930c9---48755303474.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/20066673957.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/69d5473dbb82c6ff6b4df13cb2c52986/dugodosofelarigotezorij.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/darenisizoneko.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/gesamotefawiwulusezi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/pjv84efta9ikcgcqglfmauj5p0/kikol.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/96373791495.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f5172426---lejemudiwuga.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/46628524228.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/perazotigemunasanikew.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161124040a2ed4---36937603265.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/janubedekokakex.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606f11b5eb260---75195857115.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/dapiremodegodamaj.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/47601708137.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/d31igitddfbumbkek9vd6t2qu0/mejawasozevujun.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/ditiwepolopogukokile.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78258dee94---91969560514.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/fefigixaderi.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/89981919523.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/74128699974.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/8101382188.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/goworajosetu.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_off0000ba4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4C 18372 bytes
SHA-256: 2b5aab5bb329a19eed2d6224322ab15e5c314bd36fa4206459d51370a430373c
font_01_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 10948 bytes
SHA-256: b2ed25768840db15964b8d0fa4248962636515ebfdda86546480b4ba49ea20ac