Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c14b140f4e3e85e…

MALICIOUS

PDF

79.3 KB Created: 2021-10-05 05:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 59ea2eea1225c9cac02cadfa76753066 SHA-1: 932b1bcdd85b396d19c4c86f4039f1a6f1972b9b SHA-256: 0c14b140f4e3e85e07b71809a49f8b6b061db780bbe549a72845cbfb14f0f007
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains, likely intended to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://betalinktech.com/blmedia/file/gimanib.pdf In PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131316011484---3653241141.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/fezaponekekepunuga.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/893561139.pdfIn PDF document text
    • https://alkoplast.rs/files/84154559633.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/2053986815.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/18162466903.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/10175243827.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1615bbcb400886---73789825082.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/kariwevuguxululo.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/85313116055.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/33997644703.pdfIn PDF document text
    • https://krusomying.com/data/file/996844441.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/mufok.pdfIn PDF document text
    • http://potlista.com/file/files/13325787275.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/35085695800.pdfIn PDF document text
    • http://abworder.com/uploads/files/17517475778.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/43941342472.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/65435643188.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/ropul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=there+is+power+in+the+blood+lyrics+alan+jacksonPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462622a3f91---90967521281.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_off0000c970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC970 11136 bytes
SHA-256: 1752d815cd77e3ce3cc84612f2db8f385ec5ac39f46d1dbf6010d13907d92a86
font_01_sfnt_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 19976 bytes
SHA-256: 83fdc5cd66a9a6023081ea4a0d09817d4261daa2cc83819802bd2f010d942494
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1