Malicious PDF — malware analysis report

Static analysis result for SHA-256 204545dec1f83ddb…

MALICIOUS

PDF

94.2 KB Created: 2021-06-26 00:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bddf374a974656dd641071172eb17605 SHA-1: bebb61d482192b48158a9077de2c16f23b61b7b8 SHA-256: 204545dec1f83ddb0ae4a5a1094fe7e00e3d3578c167c2effd0b50516b63e57c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URIs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4a4c4cf3da37e76105c96b25ef129387/97891204353.pdf
    • http://eurekaelearning.com/upload/news/file/30886594250.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cf09a449a06---9263592403.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3879a3deff---somakidot.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091351eb5030---repuga.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092956af3240---85830622644.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/i7ss9me9v5jtmutqcecmpspdos/nuzomewopa.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/3019af7f793087af8e6d4eb08af401ca/50294200799.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb24e2f11f0---jetewo.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609466bf76cf5---83521040715.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/271feebde40b0ca5ee3ccfc59776dd1e/43952599769.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0407a58cb4---juzewudololalakafifafumud.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf694bf3e---9392407284.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/lifcdunsvgs6bu5j6o7g22mint/geveg.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9a028978---80070445236.pdf
    • http://bawaconstructions.com/editorData/file/8810514928.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac98f856bf4---fezikaxo.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/gedipefasefarokel.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rnmpg73vgkoi831bag53n2l6j9/20594571059.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/35017340652.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160746ffa38264---legekenifutomudokepa.pdf
    • http://soles2walk.cz/data/file/67007922144.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/lujiwumoxeri.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=right+lower+back+ache+female
    • 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_off00010de4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE4 16792 bytes
font_01_sfnt_off000125f6.bin
381cef13640a0636c827eb5ee370b32306d0b48ead4e67401bcbd5fe8ec5aaa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F6 16440 bytes
font_02_sfnt_off000150bd.bin
5c604d0139e41e4f56ed7daad690c3ea481e3b06a4c22440949112bed827ddad
pdf-font-stream PDF embedded font (sfnt) at offset 0x150BD 10876 bytes