Malicious PDF — malware analysis report

Static analysis result for SHA-256 238d778156f96112…

MALICIOUS

PDF

76.9 KB Created: 2021-09-05 23:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4caf0afdc1fe024104ef0a81aaf8b02e SHA-1: 9f598c342ef1189ca3848857af24d3c9e80dee1a SHA-256: 238d778156f96112d9342eee0b108aa680c02db252f39f101a74cc02b44b54e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, specifically leveraging WordPress upload directories. These links appear to be part of a link farm designed to redirect users to other PDF files, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd086f93b---webonamam.pdf In PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e968c05f329b41c216e1fcf93f16c0de/wutokizususefu.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/kesupu.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/43785400978.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/14364680515.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/xidobedaperusojavuje.pdfIn PDF document text
    • http://househouse.it/userfiles/files/21282171505.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/41805551249.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/20993083445.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/5572876930.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/25745899197.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/63cf7ddaed0d23882d253b649082fa87/xapibomagijoponimixexug.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c215c447820---tajizumejuwifazod.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/welusodosukobapopapo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080224492ece---57570417220.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/zeruvetogigobe.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202108190713573331.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/16dd45e27cf68bb43c4ce38d9de1171f/23370287920.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/84547135642.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/89323990980.pdfIn PDF document text
    • http://wixoon.hu/upload/file/nadakaxem.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6e887f37c6273884900ea50436c8d1c5/66919589729.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/5c053be5625e5cc2774c448a6623f9d1/majanozazenozelinelidax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=yojana+magazine+may+2018+pdf+download+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59F 11624 bytes
SHA-256: f5c329c513238870a2a2320b878c25107f88ef1c9374cc640713407244c7c89e
font_01_sfnt_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 17272 bytes
SHA-256: 67476c2257e9f0a29fab447e75b1599810b265822fe18d99ff979ae37a30c80a

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