Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd3f2c8859125d6…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 00:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d34ed130f381c70ee249a21c85c7ef77 SHA-1: 2ec6fb9c656782b03899fc8cb1c73b172fb83034 SHA-256: fdd3f2c8859125d6a2f0706017cf5057dcc90fa8c43ec40b16b6fca51fbb5c7d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous external URIs, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. Embedded JavaScript was also detected, which could be used to further obfuscate the malicious intent or initiate further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://veterinariogiardinelli.it/userfiles/files/kunobozojorebirofim.pdf In PDF document text
    • http://saothienemb.com/uploads/images/files/pidawagipizavalejofotajo.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/diwowuxelofukefejodopep.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/zewaxelezemowelodi.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/57351577193.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/bibumuxeriwixosukufeb.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/85844449150.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/gusamebavup.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/77942445749.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/fediwuzegerib.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/gubovulelolijalafuxupo.pdfIn PDF document text
    • http://dharkaninternational.com/survey/userfiles/files/rajedifevituburulavopat.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/g4gdolbp5eek2ait99s6kcm3n1/4001549445.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142bd96709ff---5265057853.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/36514472938.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/80884419341.pdfIn PDF document text
    • http://nprofit.hk/userfiles/tuwusapapanidemi.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/kuvur.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/b97r1abr2bvp6fr06060m9caql/77096960233.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/mobawudazodel.pdfIn PDF document text
    • https://ms01bet.com/contents/files/junimodis.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/jadilefosebowinirijega.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132cbdb26ce2---xirivazojefikiwemuzatoju.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/70973435339.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/rozabumuvemag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=vidmate+download+install+old+versionPDF 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_off0000d9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 16620 bytes
SHA-256: 7781b3bf8c37768b902d12d88fe047b610680e68a0b208c7f3e7907d4c49c5ce
font_02_sfnt_off00011caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAF 10532 bytes
SHA-256: 3ffdb07f672f201c81deaabb1da47b33ff6a189d21109b35279f8289aaeea0fc

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