Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d47c334af0eca3b…

MALICIOUS

PDF

119.7 KB Created: 2021-09-05 16:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 82f4213028ccd77d6684671c3d7d4b6d SHA-1: cd7dce818c921bed5366f8eb63d2819b6061c298 SHA-256: 8d47c334af0eca3bb1699c659aa89f1244e57e259d01f819ba28459f9cfafe9f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis are sufficient to infer a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://piazzademarini3ge.com/userfiles/files/16213081749.pdf In PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/buq7hl7cip19mhodg6u4ajp74j/56352966260.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa12d3560d---biwixilin.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/wavetudodojetuwomiparakij.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/8713543367.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/146887404860a6f887641b5.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/fbcb76311c3a71498f5931c5818e7639/6347162864.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/63445796531.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612aeaee9d1b0---33209168753.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/5bd625d3b4bd65e1228cb3c1ce153708/netijetobolisetarusel.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95af93e4e---zitonumulebane.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/bawak.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/dd4ed8e973079631219939fd30565db1/kimizutuwero.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/25343323691.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/7njsqu19f3r8g6ut6dt5pll4e7/17867019895.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/15815383516.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44b2df1d95---garulipururesu.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/9nqo3j1u9tlvtl6t96oe8vjvvl/54289740410.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba41cf86fff---59128217371.pdfIn PDF document text
    • https://penal-garazh.ru/files/nejazukirojujovilipezo.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/fe5e72e974a42fb32e85a7df190ad8b2/77884123487.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ded8af2c8e7---64201817068.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a065365b1---lubavavigapaxuj.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/97683808321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=catalogo+bombas+pedrollo+pdfPDF 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_off000165dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DD 10816 bytes
SHA-256: 05c3ba0fe9b0d83d0100aa4507bb2da77ef108dfdba6f6592d686e7ce53c6dcf
font_01_sfnt_off00017e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E78 22992 bytes
SHA-256: 5f0ef6c1934173bab0ce1fa4a17db58703b8627d3a5045a6bdca68bafe091d8e
font_02_sfnt_off0001b8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1