Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95a6abe6bdf9c86…

MALICIOUS

PDF

77.0 KB Created: 2021-09-02 08:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4fdce26caebe6ecbef7ceecd4da9800d SHA-1: d6d2d9afa949f8d56e981c509f093f0fab66178f SHA-256: f95a6abe6bdf9c86061fdabcf0121e91bb8699344138e3408c89ec44318c1cff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://laborke.ru/uplcv?utm_term=xplayer+video+player+for+android+apk PDF link annotation
    • http://cctsw.net/whly/up_files/FCK/file/20210825_203533_121.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/xewimidowigurupujusipo.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/levas.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/e3e0ab746db1aa5f57add3dd9a6bbe1a/bezigav.pdfIn PDF document text
    • https://nomortiga.com/contents//files/tanudedofa.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/xunepedepogimulupaxom.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/4499350644.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/99390670439.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ipc83sojf1a6e42va8t2qnvor6/didupolamivonaxep.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2f75089ad2d1a04fc47a315c5f61a6e7/20940670981.pdfIn PDF document text
    • http://seamacros.com/upload/file/18048036820.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/10749918901.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/repomo.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/oohnkfdltt0pitlgq46i828kpk/faven.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/kejoroluturetopugiruf.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160accd4b78b64---15558092793.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/giwawitexim.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/58610536168.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/57751558152.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/tlvvmgth0fcann6ft2iaka8gn5/japowipugaxifibo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b586257c236---30050022837.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC793 17632 bytes
SHA-256: 5a74b0961a9df934583e987ec30849dc8e793285f1b3076cd964b98a10c63a3f
font_01_sfnt_off0000f586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 10504 bytes
SHA-256: 9bd3e086306ad24416e472b10003393cc38acfe98c722b291f1eb2c1a111f5f8

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