Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a38b9c4fdc50185…

MALICIOUS

PDF

94.3 KB Created: 2021-07-01 20:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7f608aa5f2f463eebed4488aa987cd69 SHA-1: ac6c79741e9961e56c624148a429762798d6f63e SHA-256: 0a38b9c4fdc501855e7bf22fefe07c9b2cf0c65a5bf41b43ba7b85b018b58a06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The presence of these links suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a493a145f5---vebufaxasesumutogo.pdf In PDF document text
    • http://shinex-auto.com/userfiles/file/fudep.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c88007ac700---wizixepine.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608931dfbc948---tadanejuxa.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/7tt1gbe1eilr44orvl46ovpf9f/73596975070.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084030027f36---45569198011.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/a1430fa5cf6a57304c909c769efe09ee/vikobiguwatule.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/bulewuvuradelefeni.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3fee17634eecb18439181f9983d1d5a1/71586559799.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/bepulevuguwoz.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/119ea0a4ea0dbd920fdc4301c1b1ff2d/mapukamavixevanatow.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c854ca74f71---17850629741.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/fumozijigop.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/25508966836.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/94368207808.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6ogahs5bad0rfafb4qqkvgo5po/17559886306.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/98063637577.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/056788c59a44d3f0dcd8287315ce345a/kadamogifodarakinaki.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980b366adc3---mibalobuderobasugef.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/47465371b0a88088f86b4799f1f2b5e2/xetuzazozujoruw.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6935033f5b8c3972876c156f0d0c26d6/74982170834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=three+blind+mice+songPDF 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
stream_002_off00010d13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D13 17468 bytes
SHA-256: d50f1afa05ea931abb0584903cef11138036cb5a9dc92a86bd249d8cbb07a34b
font_01_sfnt_off00013ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 10660 bytes
SHA-256: 7299138749ca06e0b3ff4ca96a59265f5a1ce07e0e537cf4fce19f9ba02609d1
font_02_sfnt_off000152c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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