Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d3c5a00ae602c1…

MALICIOUS

PDF

82.9 KB Created: 2021-06-11 06:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 873c271961aa2f239e0c4004da512eb4 SHA-1: 4f27ada61ec004f7de31af05a096d591377b7ac6 SHA-256: a7d3c5a00ae602c16b69a0cf96bc5d088c750c800c8b6bc255e423dc357a31b3
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious PDFs. The presence of a 'download button' heuristic suggests a social engineering lure to trick users into downloading further malicious content. No scripts were extracted, but the overall structure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=fast+and+furious+8+worldfree4u
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ru1uf53bjcnrs9v0g6m5nflgdg/fazubilubeguzowazag.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/51acb90a1f52505cf1a468509e42edb3/luvumowilewexulokekenejun.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b16fb0bbe02---99393903348.pdf
    • http://fitviewer.de/files/file/fadeb.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0b0653f9995cabd0d90c508a6ba7e150/59603780673.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3f22276a---wetojaxopevapejuk.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/27201kdd9cfkaj066nf5ri9480/72575223115.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/66c17c4bdbd685cb6aa2219f9fc51696/xuvoraliwufogajate.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8a06cb4d---nepujulub.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/n9urbo9cfh288ur1atjsgus4cv/musozisozaxatofuj.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/d778b46kgp20c7v3n7udas6md2/goxarafigelixiwibok.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/cttqsj0ft2t6jouahkef8tug9l/fedole.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087880cade07---40576041586.pdf
    • http://ksnjl.com/userfiles/files/53274765322.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160894c668ade6---69872425212.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/liql9r9n4dcckkj53vrkgt5o8i/18053088958.pdf
    • http://jjmcp.jp/userfiles/Image/file/30647153918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e911.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE911 6744 bytes
font_01_sfnt_off0000f9f6.bin
7896fe5e1959e4cca1ae53aa279840cca93138e42eada1915eddf341aca60d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5228 bytes
font_02_sfnt_off00010bdf.bin
cb84096711b77270515e6b633e403bb23962a303bc3f9df4dd7739036aa041b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 2300 bytes
font_03_sfnt_off0001164b.bin
18770e32f36d554fba464977c97612d01013b895ac484c43e11cb14a0bc75d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1164B 11152 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.