Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acebdfaa0af29c8…

MALICIOUS

PDF

88.8 KB Created: 2021-06-26 03:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29455b6df725c1fd5587474762716c36 SHA-1: b56091e18b015cb7f0c5d4db7a1913bc8296f9bb SHA-256: 9acebdfaa0af29c86694d9a43bbfe0f628b444fb4416c446665319e712c3e2b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/cb2l89to3nehqootrbg7enm7nh/zidevujopozupapile.pdf
    • http://wildpflanzen-planung.de/file/veresusifakatesilozuzewe.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c54a56ba90c---41095520637.pdf
    • https://bbpartner.cz/userfiles/file/nabomelive.pdf
    • http://www.urbanwaterways.info/files/58518073599.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/9354182fc09a5e12503a308f1f37bfd4/sapuwekaxube.pdf
    • http://adamslakeband.org/userfiles/file/46798329356.pdf
    • https://tomas-music.com/contents//files/bawuz.pdf
    • http://imssp.by/data/images/fxeditor/file/52037477038.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9404b210b8f83fc7120cf1bad04227e/31239001705.pdf
    • http://wwstationery.com/files/file/54076420197.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/9eghr55irplf5pigakmmu33g8b/dabelupavetimupoxetupuza.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7a9826049---2231740443.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756b21bd36c---pexuzifujetod.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e0cba6b0575c56a6cce7a9a2d742d723/wilimukif.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/4fc7b32ab71a0d452d5ac520c0d17a91/70874204610.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/aucctvca4mkjrrv6q9be82tki2/dazavilexosoxigurunovu.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/onkje22b3bu4fsf9cfuo17qcr0/46323405578.pdf
    • https://koratspring.com/upload/file/bufagiwugusubewudunu.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/aj4dh8co6ficq3tmigb389i7l0/xajefeg.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a2056d944---seketoneniz.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb6f35ef70---dexoxedaxubogiwinad.pdf
    • http://architects-desk.com/uploadsfile/korafekuvoka.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=commandos+behind+enemy+lines+free+download+full+version+for+pc
    • 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_off0000f1c8.bin
df75bcd8958ce1ad5ed58484bf416c043f4404f82a166335549a47318b333227
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 18872 bytes
font_01_sfnt_off000122cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 16792 bytes
font_02_sfnt_off00013ae6.bin
3d1733339032bc9aa6b6abcc674417666a849950e08ba2aa29189a2e062b3aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE6 11324 bytes