Malicious PDF — malware analysis report

Static analysis result for SHA-256 f096f5ac2642c1d9…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 00:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78b78466df909b39e16e433074f93992 SHA-1: c045a251096ed551346646b8497e9ba2b96a8c76 SHA-256: f096f5ac2642c1d981580edee1bc2081b0721f1adbc556b1394bc2ea64d3b35b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://aviatechinform.ru/sadm_files/26362084257.pdf In PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16084f594792ce---fupebovenidopobafuni.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8f26cf634---67207351890.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/fecab721e008a35d4b47bb4dee69970a/lesanobelatuxater.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e182a455a---gefabinukuselunegeno.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/63346772464.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/69925320507.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/toboloveb.pdfIn PDF document text
    • https://aashianarealty.com/file/62225906319.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/biridujokax.pdfIn PDF document text
    • https://tavio.ru/files/file/80415126236.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ko4b1qshsd0ti6qsr3ubn0un62/sugaz.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/bamawazufotofajujoxoga.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jagudebewipegosutiduwozo.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/27002613273.pdfIn PDF document text
    • http://soupworld.de/upload/file/kajogumexekepesebaputedi.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a63c8e3807f9e41fcddbc0bfd32a443e/gojojutalakasevikanaruma.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610d27aad560d---43804428917.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/nalulito.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/49099316619.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/97814850962.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/fe2259d606b9ed515d0d0c64b0ac7c3a/gazofabigofirosesobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dotcom+secrets+book+pdfPDF 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_off0000d664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 18068 bytes
SHA-256: e5bdd656bfe420118c5cd2fffffad0b161621646e2326bba9374a786d2eaf7e2
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 10608 bytes
SHA-256: ed9904995b538a43fd00a0b56a025d8ba7ce7134bb0349ef1e5159306e634809

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