Malicious PDF — malware analysis report

Static analysis result for SHA-256 9020925115702f19…

MALICIOUS

PDF

74.9 KB Created: 2021-08-17 22:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72a4226e7b89d61e19faefcbfa3614b3 SHA-1: e329201ec69e93f1de94606ed73845250c722825 SHA-256: 9020925115702f199bb61a47bfaedbee1141d07b46503525932c84e167ddc1a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d47126006f---18744718456.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/90880724368.pdf
    • https://snqrsl.quebec/upload/editor/file/fifodofisamikabaxur.pdf
    • https://habibitours.net/ckfinder/userfiles/files/sojapowekegin.pdf
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/tujidomimejodaxurim.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/1l27e4g7sstgimkj6hkbfq0al7/forosoxajerojezidenu.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160823e1860819---62699765205.pdf
    • https://organicfertilizerproduction.com/d/files/giwetivaroxafewukid.pdf
    • https://ngusacdon.com/upload/files/jifavofenebemogenefapu.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/3da7fdf066baf07a61d796bf9ef9a235/48426106435.pdf
    • https://masihpt1.com/contents//files/78136728821.pdf
    • https://elesud.it/img_pagine/file/jisikexinoveveter.pdf
    • http://agcslohian.com/userfiles/file/kiriwivow.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/59582995511.pdf
    • http://01host.ru/userfiles/files/nudepajofan.pdf
    • http://3e-machinery.ru/app/webroot/filesfiles/buxelunojamonoxu.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/6am0086776bff9u7irlctkja7d/guroxi.pdf
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/gasofulivubawo.pdf
    • http://eprdel.cz/userfiles/file/fosegi.pdf
    • https://dlt-nkp.com/fileupload//file/wogevuj.pdf
    • http://thaiboxes.com/piceditor/file/23502009268.pdf
    • http://koreaseowon.com/ckupload/files/24947653137.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=grade+7+listening+comprehension+worksheets+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1bf.bin
8dc1472950edf6a266b24ae34f25c4eaf74ecf6f48f960d652f9c2ec95c30e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BF 11336 bytes
font_01_sfnt_off0000dc1d.bin
bcd80b76bc6a28fccc0d5e9feccea6acd6500a5d07c0c707ae2ec7dd967f80fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 16500 bytes
font_02_sfnt_off00010573.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 16792 bytes