Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3293374bac936c1…

MALICIOUS

PDF

91.0 KB Created: 2021-09-02 09:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 035c749c595cabe4cf2c36c010fdd1fe SHA-1: 49ca8a7b66bc716b6a7e319856cdb4f0be4228cf SHA-256: d3293374bac936c13c1fd2e3b1336874db30062b5ada511a6993db0b9e514190
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The document body is heavily obfuscated, preventing analysis of specific user-facing lures, but the overall structure points to a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/76287426963.pdf In PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa6eab27a---17827550785.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/25300655154.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/041e3979deae44eee1e4592c5e15d90f/zadagikarujaxivuwenok.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/gumawa.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075013a18abe---3425748270.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb17332f5c6---jivavoved.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210626090032.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/xawurugenonudobarowo.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/vobatunud.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/18671496811.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/91411035860ff8d90729cb.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1af3fd9b12---81113379578.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b53c03d2d---65169671817.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ac3df31079ad22c28a1d07e50f3dff01/lidupadexapexaridoto.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/fazubezo.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/26185427874.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/51246153266.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/dadig.pdfIn PDF document text
    • http://ippon.lv/uploads/File/94928251333.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/rapolutowoderidaxusirusu.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886340c4cef---dupifotekavisip.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/193d2317fe1dab111af6ea14f4effd67/49061948836.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/47501590727.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f6a7086baa577fb9cdef559326efcb98/gatimuwelivimamiroralosu.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021062216035170554.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/xatinuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bawarchi+tiffin+caterersPDF 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_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 10408 bytes
SHA-256: e5bb0bcc2f154799ca3af814d4b59824bd5a4f4a2cc089e9f69d781e302c3305
font_01_sfnt_off000113d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE5 18836 bytes
SHA-256: d43f0459c395a0d79848a01dc4fc2b0f0909f299fa2a8c2ec848085fa4dce967

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