Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fce3a5afe17f1da…

MALICIOUS

PDF

82.4 KB Created: 2021-07-04 02:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 230257ace7edcdb9133f1db5dbe4af16 SHA-1: 2fd67fa99d1e7a67f909c850ba1c5dd2e943b6c6 SHA-256: 8fce3a5afe17f1da6ab53795f3723b23d15ea4537d5141362ef37446a612cf72
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves directing users to malicious URLs disguised within the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=drawing+in+drawing PDF link annotation
    • http://ingenermarket.ru/userfiles/10765919791.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/fagotuxudujibaziloxolef.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9c9eda35fc0b87859cbe1d62f844403a/busowofogabazosadosafunev.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/87167291980.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a34331109c---gijusizuxibotubasuwa.pdfIn PDF document text
    • http://chinalabware.es/d/files/semimenam.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/osc536gpkp3gvg1njh24in0u95/7492401252.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210517061231_1178809356.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ca50e787c5fffc7a5fc37592445820da/bijewajag.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/45629512510.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/63165555338.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/xuxene.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d42258243d73399de7e910d75d6a573c/83652002428.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/7cfc24dfbfa769e63c26b21b45c83869/niselafidubusuzexub.pdfIn PDF document text
    • http://armanetti.com/images/90647518761.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4313b1f36---vosafovizuxejupabisasales.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d125f46e41---86917702992.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7eb7d913d765eacb5886bc792625b53e/zoxilosudumekazetufiteta.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0928c246---loxoporolememisofo.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/290418256055.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/tpam1ih4i1afg6bfoibvdhead9/27586124115.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/56769533262.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_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 9948 bytes
SHA-256: a77dc4e70a42b78253389a7b115a2540dceff8488864ba8e42e260a01799c44b
font_02_sfnt_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 16556 bytes
SHA-256: 1cecf07b84ce5c72d33844ad17992b69fd3fbaca2531c6719cc003e5a08cc8f3

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