Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab37b45408abf2e6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 22:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2dfeb639c72039c9e5bc9ca9028cddb8 SHA-1: d3f102e7463bec563119ea1216a646811dfdb172 SHA-256: ab37b45408abf2e6b238e09f87472ccefd0e8c3105124e2215b4e7cf7a473f23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://dellalontra.it/userfiles/files/puzosawowivunazadelurup.pdf In PDF document text
    • http://yetisirkaucuk.com/firma/files/gomonumelazalejodav.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/nulag.pdfIn PDF document text
    • https://clove7.com/userfiles/file/nawuvugafiwuzomiteba.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/b8987321663a5e9df94177c2fe7ac3d1/15733940284.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/18108577727.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/dukisefebekemaso.pdfIn PDF document text
    • https://spacio.hk/attachment/file/5772678275.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/90220657863.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aad60dccc97---64655773728.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/626411548.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d135552b0c---48796864360.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086ae167acb9---bopiwajikidimosaz.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097480502672---xapemot.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1623106187323269347.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/21831472131.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/jojekaputukolireviku.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/13474379466.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/vdtrf41gqs80c935d9jj1lsgh4/widazobiwisu.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b967f9a7d4---85615946323.pdfIn PDF document text
    • http://adria-ex.com/bipurinesijexazol.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/20037206454.pdfIn PDF document text
    • http://bjjiffy.com/upload/70801634523.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/1lncl4e7hog12kdhdbmuenkhn6/98244260730.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/88956265684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=syllabus+of+sbi+bank+po+exam+pdfPDF 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_off0000d4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 17092 bytes
SHA-256: 59e98c6af16c537b5dbc5e6551b7aa513cad7133c26cb086ebff44ac475e1d7e
font_01_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 11084 bytes
SHA-256: 16773de33708cc377fcc8c689b03136126c16a31815091fa381722451235fafc

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