Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed95b18825c3b37…

MALICIOUS

PDF

77.6 KB Created: 2021-09-03 21:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2a84486f8fc994ef3781d3ea3d777418 SHA-1: f76f2f39087ae414607bd63729c8e2231a7b72fa SHA-256: 5ed95b18825c3b37b8c0c64f406fd109d80ba56bec37fad8100dd3209072c4c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress instances. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=liver+cirrhosis+pdf+2016 PDF link annotation
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210630_0537934F3AE3425E.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/82331874569.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/dg1qh4li6hu95rbjca2m34p2sv/vexomarogosapatuwivexo.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/57573817901.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/welupulerubarita.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a194714c52f---gosaluzonibeliweviki.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b03acce77d4---93223644509.pdfIn PDF document text
    • https://camelcarpet.org/d/files/84675636381.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612727c0cde78---82095550319.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/dolorikazujoxevafedow.pdfIn PDF document text
    • https://sapporopools.com/contents//files/35198718659.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/47334639073.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/40820709909.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/daxikudepavonefide.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/46831909939.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109010133127364.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/261eb73ca59d992ee8747c3aedec8e83/39646619073.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/vaboj.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/99801764135.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/68005344423.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/fevagozikewizafavagifeta.pdfIn PDF document text
    • https://zhansq.cn/upload/file/gonujafupunifon.pdfIn PDF document text
    • http://elm3rad.comfile/62175831532.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_off0000ccfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFD 16628 bytes
SHA-256: c2f8cb633c8c808caf39839b84b781b77a0e9dc2fac6351f273b5f97bdc0f245
font_01_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 10792 bytes
SHA-256: 12b6fa403267737a09cf7ae2f6d93449bb66b67a870d3a7ff457449c4c9923da
font_02_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.