Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53a70d3b79e8ded…

MALICIOUS

PDF

82.2 KB Created: 2021-09-12 11:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 009acf1a7d669a39ca0dd7d0d1b577ad SHA-1: 91215098029aeaa071a40d067afe93366cd15f99 SHA-256: e53a70d3b79e8ded62f5ed80025492bd407ddc55883257f62d7b7ac19f0d55fa
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=commando+2013+full+movie+hd+1080p PDF link annotation
    • http://jar-ted.pl/file/zawovokimedebora.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/dutotul.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/59932733320.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/908f14ce25be1ab9f3efdf1c15debf2e/paroraxurekizewi.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/powepobolifubasapejorisi.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/nesokoxo.pdfIn PDF document text
    • http://mousike.it/img_ins/files/vepelokevoxukusa.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/bubex.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/56968063318.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/sunosijeb.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/fapafodo.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/39747154596.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613750b0e7628---89736573839.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/87109719510.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210912_124604.pdfIn PDF document text
    • http://domuran.pl/files/file/24917295635.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/mironozerasixoduguk.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/bajikosuripu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6ae2918bf---vubezefidugasasilizoledo.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///71304618327.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/podisu.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/fased.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da922bd8d6---44552026252.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/41018146744.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_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 17564 bytes
SHA-256: 63bdc053902c756af294f2ad0578dc7ae8fe0a16fd2d5bf3f55f0914e72be482
font_01_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C5 11268 bytes
SHA-256: ed7b5485c6382f358638ef96914ead1821c41143d0bd306b582af4f8b6533f67

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