Malicious PDF — malware analysis report

Static analysis result for SHA-256 184bb00a919dc05a…

MALICIOUS

PDF

100.3 KB Created: 2021-09-19 06:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 35d32e2ed3ab77901f2ab0c077a82950 SHA-1: cc5d930ba9f554c998b6b178cb279833be1668e6 SHA-256: 184bb00a919dc05ab445587a2b6d3c5a006d393e9fdfba13928d7f076c0eed8f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://maria-galland.ru/files/file/pudepi.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614516c5415cb---284670945.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/29439725727.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/tasoja.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/febiwogozowenufod.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/xokelozononimevivemekure.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/mawajodamowusogebarize.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/vuxotobataxizasemesiguv.pdfIn PDF document text
    • http://chinalabware.net/d/files/renudagin.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/tifonato.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/80155900464.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109010904241852.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/nfv7nqlmvv04hoie1ij5gsqad7/4885529244.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614142d95b7ee---rugidomasumekuj.pdfIn PDF document text
    • http://meditopthailand.com/file/wuvuribexatozixaboroxelon.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/putubowiderezufokomew.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/37775693029.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/lufizuzufi.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/87052630964.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614207da09766---kedadupodivutedu.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/22217150500.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdd179660c---dumutases.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/68979374179.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210917_D94A006D3E2B365C.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/45160301557.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/feguxiwedisunozebix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=soul+calibur+full+game+download+for+androidPDF 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_off000117f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 21808 bytes
SHA-256: 14d34486b7e5597154a4269a4293a705cb7e17d747fe153edb34777561434d68
font_01_sfnt_off0001518a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1518A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000169a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A1 10956 bytes
SHA-256: 9879c199e2475a0104f1d8aed03035b46ae7cdec43d036385b19e92e752429e9

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