Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a2980949316458…

MALICIOUS

PDF

88.3 KB Created: 2021-09-05 18:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9c52edd7a6feedb61b1e3d15ea72c3c2 SHA-1: a57eec1459f00114c854f7f485d6de30856c0060 SHA-256: f9a298094931645835748ab6dae87b1dbacad4fa8154cd41337525eb16861cb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF acts as a link farm, directing users to compromised websites and potentially disposable hosting, often using UTM parameters to track clicks. The embedded URLs suggest a phishing or malware distribution lure, likely related to search results or downloadable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=minerales+de+la+corteza+terrestre+pdf PDF link annotation
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/6pgrckhdq3jhg0ed5uq2u4hro6/wagewolizevoxerebug.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/falunurotizuwojufomedo.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7eb76811e18acd8e153c7eb764368c7d/50656316093.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c8bcf685---durarepalefamotizeziweb.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/sofup596jlh38otkvh3o3cn6go/gevijabovu.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/q65taciort2at3ng5pr4d0e4d6/lujisixusekibi.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/89879983107.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b3215a9e0---wavedesitusibare.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/sobilukugasovok.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/19587646474.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/5788f72bc93d85d82ce4e4d85cfcf5ac/jilubitigotoninerusevose.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a247139f1ea---kinurozi.pdfIn PDF document text
    • http://stromzeleny.cz/file/72115961878.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/zokurimazizuvaromaze.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/98400231971.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8462e0cd1---kozefozadesefefopuj.pdfIn PDF document text
    • http://rld-carbon.com/file/webinebibotafizabuto.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d82f1eab0ca---56755674974.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/b61b894318b6657098eb6af86ad923cc/feduraxikel.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/pojivok.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/6aff8ec9b0f269051828b32edb9154cc/kupupodepigidufafal.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/88115543004.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a41d07a39ab9ee899fde549e9bec1e52/vetorawemisiri.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_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 19156 bytes
SHA-256: 4a17f8276a95bdf4749b076f6d5f4cc87505d9ea4f1de6fcc2cc707b8b67d8ef
font_01_sfnt_off000122eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EB 10664 bytes
SHA-256: 279ad9dfe51e649f44aedec64cda42f6d414866b061e2688ed6c1c0e2dfd8b5d
font_02_sfnt_off00013b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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