Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58b4bd0e4da95ba…

MALICIOUS

PDF

73.0 KB Created: 2021-07-31 16:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4405539f0d3bf57222eb87198db6f7e2 SHA-1: 9381cb59a8d9c8ac784940b08e40f31fccd7cdfe SHA-256: b58b4bd0e4da95ba3209c0ffdfa7da7128ece9c8caa585e91246b322e41c940d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary goal appears to be redirecting users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://allytemp.ru/uplcv?utm_term=aashto+lrfd+design+manual PDF link annotation
    • http://arabic.cz/ckfinder/userfiles/files/96400917659.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1071366a33f4aaeac0630d00f4c74837/kidezep.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb86ea0f8fa---zadofarekodafux.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/f0500673bf7506ae78f7d416a3520f36/58355207045.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/nogijogunosapapuzeravuja.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/vubuzab.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/31113494344.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/jawekijulozuvidebas.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/164c603916ada333e019cd09fef0d50d/memapo.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/95980195919.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/98521081959.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/sawapifijizifiguf.pdfIn PDF document text
    • https://media-get.com/userfiles/files/86304732081.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/97813836480.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/44472619094.pdfIn PDF document text
    • http://yongqingtech.com/d/files/sabepug.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7916536030---72063062932.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb50a8483---49565480169.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/nojisetuzemapofonagoxilu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160de4f8691c95---boranes.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5cae7c96e---wetibigiwugonibabob.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/85053202190.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b55c568ff---lolupawok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0fce51945---lewepigizuzokex.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/wifirotuvaripopebevogok.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb564dd802---lolodiwipapaxe.pdfIn PDF document text
    • 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_off0000bdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEB 15428 bytes
SHA-256: 7224da296bd59b4bb7fe70b0db92287559d1b576c27be59cc300259e9210cdce
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 10884 bytes
SHA-256: 66ff7ba8ccfe627a200758165c50d8c6dc268b1161ac17022a4818582a7f7354

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