Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c1602c0dcf949e…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 23:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a16506b4dfbff594394881d1c7dc034e SHA-1: 24638138eb9f688d10ca4c284d967ac53832069e SHA-256: a7c1602c0dcf949e76b18bbea3cd73e7fa86e373e93c7404bc06c6f8bc4b9a0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://tresonance.org/uploadfiles/fafadana.pdf In PDF document text
    • http://watthaistuttgart.de/userfiles/file/tideperepajade.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/vut8j0gmpet00a2keqevfqpui5/47219494445.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/vejalogevodedi.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c82780c2d8---26158297317.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0c440e9e---70980628458.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d54b516bb95ac1aa5d8a6973e3774a08/lijegosutojoxi.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/luduxaxolizasevufevuwi.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/f916c5c899c9e017e02e5a3f1c68be0d/xizewariwesariteji.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1624407080.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd14bb9b656---jebujugajida.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/merosimupuru.pdfIn PDF document text
    • http://techbis.pl/files/file/nulagisapedezut.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/73e2ef70e857b497d39220e53fc42508/nakoluxijuk.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/xuwomenifivewa.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///77704458138.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/021528557448.pdfIn PDF document text
    • https://foulardfotografando.it/file/jesemonizinifejunapixirat.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/397d8ecb96dd9ddf67d98d55dc6cfbee/17728723581.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/jojakikepewawufuba.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39c599edc2---suzilot.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f45ad81c305034e9c3e9a677b549c737/32685600075.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee06d29a94---tetitugugatunitap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ingham+to+townsvillePDF 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_off0000faeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 10560 bytes
SHA-256: 91eef3ece8831d56a8048a7f8f0068a709d40f54891dc97c9ddc2336440db7d3
font_01_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 17492 bytes
SHA-256: 71dbd87f702416cd1c8072287583ecbed69fc6dbea2da5d2805df3fcf230c890
font_02_sfnt_off000140ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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