Malicious PDF — malware analysis report

Static analysis result for SHA-256 888852652f494efb…

MALICIOUS

PDF

78.1 KB Created: 2021-09-05 19:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1f4f56a397387f35beebb7064d5f9366 SHA-1: 8d73e63e40ce111ecb742e840bed077d3c61659d SHA-256: 888852652f494efb39b46971db6f08859e172df1d0f704144f75da9a0372845c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://abwlanham.com/uploads/files/zakividenakizaborojipemu.pdf In PDF document text
    • http://tarnava.eu/user_images/file/vataveta.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/37063448346a1218556816d2ae3915af/razegavejebadobe.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/90500031378.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/c91c2649ac99515b17ebc911e8094083/59510490180.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/63499881163.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f79e8c538---wuniselipek.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb45a284f---45052815262.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/97780524604.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343378da823---47047579160.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/47159901a2d61f9b5de3bf608ca486d1/lawejudezidodipuro.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/557dd459f29c58ab0fe0f8596459ad9f/90355373705.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/574aa63035e7bda9acfc4b51c1876ed1/52022212751.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/nesilorabemi.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810945601e1---geradevafudirezifomupodon.pdfIn PDF document text
    • http://888chji.com/userfiles/files/24539540032.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/39345186925.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/morewolonedefobumebinused.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/48152479852.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/ledotijupunavop.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/9336237643.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/nazililetiforazudutevexin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=mitsubishi+outlander+2018+car+manualPDF 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

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_off0000c729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC729 11372 bytes
SHA-256: 5390fd228447d26c2dbff0c4b8a48ed4ff27d850c8adc72640a8c9475abd40dd
font_01_sfnt_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 18920 bytes
SHA-256: ccaf9d3e6e3e500a816fb8a2740403ebe1451afb2cb61faa0741f94017c6298f

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