Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc62e1cbbff3cf6a…

MALICIOUS

PDF

101.1 KB Created: 2021-08-10 05:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f5b2e55b786de777396c71a6fad1047d SHA-1: dd834d52cf49a8f92e3b24812a1580c5afc2d8b6 SHA-256: fc62e1cbbff3cf6a3c26549f22f307c57f0510237385443ffe023b4f3f9d9e94
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm indicators suggests an attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/a4b3fe5ae0bdb79ca0f271a830908770/bokoradobomuzuvuma.pdf In PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609252894033a---93227911856.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f63e0b2b9---74843752836.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f179049db---90823329605.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/1d7a146204e3a3825dcfd2794163b149/67810560815.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae4b2b163---buramosik.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/xisifukuzame.pdfIn PDF document text
    • http://domainecomps.com/documents/files/natazebov.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ao15vr4t4oju2efqjj3a7ib55d/difepusewofevuxawovu.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/73087239524.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/85342074021.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/jiviratu.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e586cd1469---77722439391.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///43244533843.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/i6cpsd809me9hlkpr0p4u3b0r0/meferumerukewi.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/94372777399.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/71481391926.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/naniloril.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207f49ac4a---12778873803.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160badb3bb8edf---4380122647.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608396f429fa7---56958492985.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b57d1ba7e4---xijazezozobekozasuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=super+smash+flash+2+unblocked+666PDF 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_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 11388 bytes
SHA-256: f2caa0a9f6332d73d3fbcd9efc4345330ae8b090898c8769d14dd547cd28a54c
font_01_sfnt_off00013eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156BC 18332 bytes
SHA-256: 0d5be6c29b1d728a05d126ba7303a193457188486af838e21b2c508903f0ea4f

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