Malicious PDF — malware analysis report

Static analysis result for SHA-256 7501a006be1294a3…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 08:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e1d1aa64c93839c5f53f93099ea0bab SHA-1: 744182c95dff248624736b0b224dc29fec2320dc SHA-256: 7501a006be1294a37f5afe84accac27fdb463b7b9938ce36cf9e20eb8835e056
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely intended to lure users into downloading malicious applications. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://kientrucphatloc.com/upload/files/mojerojekunubidabag.pdf
    • http://www.gpe-el.pro/ckfinder/userfiles/files/mozokipur.pdf
    • http://imbirimbir.ru/files/wunifoliwajosugode.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/2906038892.pdf
    • http://samuiluxurytravel.com/Uploads/file/73560548681.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c18459c8a2---vanenotikolan.pdf
    • https://feltshoe.com/userfiles/file/pewejopiborobumanig.pdf
    • https://pecsikult.hu/files/file/82460227286.pdf
    • http://www.huntsvillepr.com/files/files/zumoninepitajojapemuso.pdf
    • http://bptramptour.pl/files/file/79082802505.pdf
    • https://nirkongrp.com/ckfinder/userfiles/files/54951848996.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7ldcblerg7lc6m9rdukmhb5eni/jozerize.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/gotivinidisejamizi.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fab94cb989---39261349604.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161427af8d44e2---bumipevotukivarudelane.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/luzukenafuribuxoge.pdf
    • https://hiroyoung.com/data/files/jopebagesivebufif.pdf
    • http://aotwresort.net/ckfinder/userfiles/files/57820189362.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131899174ddb---17644246967.pdf
    • http://jaatkinson.com/userimages/93938560221.pdf
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/megesajo.pdf
    • https://bengalroys.com/ckfinder/userfiles/files/66746912533.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd425fbda---ladenu.pdf
    • http://photo-ostrov.com/ckfinder/userfiles/files/kirarekawufetixojupaker.pdf
    • https://oancora.com/ckfinder/files/paxit.pdf
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/pisumamajesazumepifelo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=language+navi+app+download
    • 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_off0000db68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 16792 bytes
font_01_sfnt_off0000f37f.bin
44164811de2c6b57f39aa8aca019d53bffe299fed16e8d268ff35660c19947f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10408 bytes
font_02_sfnt_off00010aea.bin
37b4313828cfce63ab3f5f07471373838705e9fa560baedaff898d08cc5c1719
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 18056 bytes