Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a380fa18adfceb…

MALICIOUS

PDF

89.5 KB Created: 2021-08-02 17:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23da16678d504943813650d92d40375c SHA-1: 0a74b72b5c903deb8c1ea62d602fdf45128eeee1 SHA-256: 29a380fa18adfcebc079d10920c3d1f902c73522223183dc9abf0e5a6b6ec706
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The heuristic 'PDF_RANDOM_URL_LINK' specifically points to a PDF hosted on a suspicious domain, indicating a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://aadhaarretail.com/administrator/imagetemp/file/9742735339.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b13040cd223---neziseda.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee04e5bd68---lewutegepojekonuza.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db077442c91---66428298839.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2ac0175dc---79399519667.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/59119080570.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0542e6005---dedazixebanusivabil.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9c40e058e---36839121907.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1bm6hg1k0g55g9lm3a5v8nlc37/xibitalowalexeduvefesuti.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2b1b6147f---tokubikatanudurox.pdf
    • https://aletihad-group.com/userfiles/files/sutalomakubuxulenod.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a8d64c017---16313066358.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/33bf2c978de884e7f6fdf4181a1dbb29/lufewonomosidukos.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160824382eed85---43502375053.pdf
    • http://www.anclupnapoli.it/userfiles/file/xamaxaduximuzikewop.pdf
    • http://krasneclanky.cz/uploads/ramaranir.pdf
    • http://ituor.ir/basefile/chartermeinfo/files/58096393628.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/50d48c6344eda1430da912dac3ec807e/movapewusurazab.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/ab49d7ff0b7a2e7d8f255076945971ab/jodubulot.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ddac6a797---tuzipaligarufatamone.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a8631482---xuvijozufejobisoma.pdf
    • http://sbox-technology.com/upload/datoteke/podexak.pdf
    • http://teenmag.cz/userfiles/file/bumegudumeduvulinujebeza.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af9f1110c1d---rasusalokozibudamafex.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6f3789efc---97065531431.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=bajirao+mastani+full+movie+1080p+free+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_off0000f810.bin
8e5e957af8478c883766c32b53b7f81923dcd60a0a7e1cef48cd1015c08f246f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 11476 bytes
font_01_sfnt_off00011343.bin
ff8b738c24984b4ebe1e959e807599221ed869984e411f2c8dc331b65c44c944
pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 16964 bytes
font_02_sfnt_off00013f33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F33 16792 bytes