Malicious PDF — malware analysis report

Static analysis result for SHA-256 46774d8de6228394…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 05:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d27378639c3ad65e2c8b1e4309edc0c SHA-1: febde0b434742dc409d51920697337fcde3a09b9 SHA-256: 46774d8de6228394a71270b24c793693753f5bf0af286e7f77831a61eead600c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URI heuristics and link farm indicators suggests the document's primary purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://jubileejec.com/userfiles/files/74237026663.pdf In PDF document text
    • http://scales-center.com/shop/fck_file/file/20564578933.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/57260538112.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/54022748588.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/54238115827.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c029ba4fa31---noxivimukatiz.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/11549821464.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/47420365469.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/80210124367.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16074320da27af---zamogoxuliruguxawopikogav.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/db80c1ef02bd0d6d232bde74a29fd627/98079228161.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ab6d43605ddab80be97bb55bc62cd238/20291597672.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/sigidomutirekefawumerexib.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/953285d5057cd88133a478f3b8a55954/nenemezek.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4389a7794---buvot.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/e8bd6ff288e84483f1e0c54ca41f3156/pororo.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/l0rfilq1kmas5n0g64v8j06bd6/10064578142.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/kizurawasefatagusuwebopi.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/tuliwetefigome.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/dotukabumeb.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/55284542706.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/12847797302.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/doguzurake.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b692c65c64aa2586447042c79e921b3b/memukuvibopalapumiluwow.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/29796933731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fruition+in+a+sentencePDF link annotation
    • 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_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 17956 bytes
SHA-256: 44de47dd78cb0d90513205b05be5b4e148138b30435860d932624dcffa1be462
font_01_sfnt_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 10252 bytes
SHA-256: 9d6ae727eb1da85dd1fb1d182875b7e312a36d4e820c1436954cbb553951ac3a

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