Malicious PDF — malware analysis report

Static analysis result for SHA-256 32680ebb8dd4ee0e…

MALICIOUS

PDF

89.9 KB Created: 2021-07-31 15:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 79bb834142cf7751ff70e4742f37c81e SHA-1: 8bedad0b98a27b84b7d0d7e17ab88dd7f3b6a5d4 SHA-256: 32680ebb8dd4ee0e4e43ea9ac31b2b8c206d31876db947c6a4dbaadb160e8ddf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://hotstamping.pl/files/file/mupidovopuvi.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/af5ae763d3de5f4d5fd7d283eb23bb38/99304507205.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/69410413354.pdfIn PDF document text
    • http://ramayafaith.net/clients/64268/File/desopanogixerisixofe.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b1d806bf2---71375170933.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/60244559137.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ffb0adc3c---fitetizexulibul.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/k7hgtej0r2c6n52oul3lgp9od1/lupitip.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6dc5fef54c---daguzelemudul.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/fosilivonipubopizug.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/bosufanalaxiwanagunuzuv.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/rigagevaxi.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab8926fa35---rodutefoj.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/88cr3im670p2bm6lhpvke41q90/81811705934.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/ruselekimajupomum.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/foxuto.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160747e2f9ea98---26907260184.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/81244713034.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/a1r8gcnmag2ilcu82ts8d5o4g3/jigiwo.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/65561011400.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/xenisalawifugiwutuweb.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/debidimefomivopasamevux.pdfIn PDF document text
    • http://chapelguild.com/images/usr/54876991090.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9ab48f6cd6fce18c553faacb79a818c2/nasanezawejojizozopewa.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0de0eb6e0e7b12f49cf2f7997c468c52/35871662175.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/74336644881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=chlamydia+in+pregnancy+treatment+guidelines+ukPDF 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_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 17040 bytes
SHA-256: 1003655ea1f64ea96e4073bc894c45e865f9ac06942108b5e06673241a4667ee
font_01_sfnt_off00012545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12545 11180 bytes
SHA-256: 3d010927cefedb3807b628a4db9aefce7861d6f1fe8a2bea621cbd8d9914418d
font_02_sfnt_off00013f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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