Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce574a40c8c135c…

MALICIOUS

PDF

77.6 KB Created: 2021-09-17 14:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa33189c93d8fec8f62f4e3189b4deb6 SHA-1: 1a5ad1cb61cab94f50d4e935780616aa49b0169a SHA-256: 0ce574a40c8c135c460a04dacb2058d2b1e581e83fa934fd31f35a53ab168989
156 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to exploit SEO tactics, directing users to potentially compromised websites. Heuristics indicate a high likelihood of malicious intent, with ClamAV detecting it as a phishing trojan. The presence of numerous external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://oniceh.ru/uplcv?utm_term=tekken+3+game+download+apk PDF link annotation
    • http://contactfm.be/userfiles/files/notikividugano.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/46b5e5236e555e2d23dc0fcfb7ac2cb3/jowujuvijadederola.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/62305451550.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210901080229.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/kadoxoril.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c1e5505b53b420f8983e175ac983c59b/fetegolugawos.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/xuwitiwutotimejorunoxoza.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/kivipifazezidilofotokopeg.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/40564333831.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/34428027316.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/60058082844.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/74932901364.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b75d3357e8---85886184920.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/35797734084.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/37653629250.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/8665374644.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/vidisodokopafenujewunil.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74fc6f7bd---66406791515.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/wibatevusuvinula.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/59204122116.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/46755317946.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/21554695401.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614150076a824---77775019833.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/47329335324.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_off0000cba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 17460 bytes
SHA-256: a4b2329c35864656a231e3a89bb8f07ffc8c4e63b6df742e927963d4858e69a6
font_02_sfnt_off00011109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 10588 bytes
SHA-256: fec252116f57be0ba3dabc01f950333c24be639216945ccfcb63f0d84a437bec

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