Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc0f29eb3695e27…

MALICIOUS

PDF

97.7 KB Created: 2021-08-03 03:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 46e96efc181b09cbc8f0a0492e5f35d6 SHA-1: a6afc7f54c0712d2f0e3fe0e2a929034dc7239f7 SHA-256: 2fc0f29eb3695e274a5ec3a6d2557b699319256e21a7c68503f0225989344535
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites 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, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/85409bd8524927158681b596be24bd5f/jexenebelenete.pdf In PDF document text
    • http://pizzeriadevita.it/userfiles/files/43334692151.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vagijurilenelugel.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/98151432298.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/trju4rhq6foqoo09i2ejrbl0c4/58539490533.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0qj4tvgi415mg8aevpdmfmavl6/vuvaritiweradimifodoto.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/5864fcfqe7mrbhj21atrnqqh7p/loxawefarusogib.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/tigofutira.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3c3a7f9c3---fexowamalokep.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2j160ln5bkjsko87fm7g5pj25/kuzivigitowipawovubi.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e33f71d230c4161f44695adf9d3d2909/dinajokedigam.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/95d7ccc31e1c0776774f15e0e2146520/76310176220.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/48649888399.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99c34a15b---veniramipitaxetekikagem.pdfIn PDF document text
    • https://mytopics.it/uploads/file/64520039183.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/gozolafelufatoga.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874d491d235---79501459739.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/18975512889.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e82705fdaf---611818775.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/jotevobuderofunaxuta.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6c2a441b0---13028346001.pdfIn PDF document text
    • http://pjteam.hu/uploads/56379024673.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/5568358379.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079396d70ef5---zesopupujifolojujafanesa.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/zifodizijibuxirunoted.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb86e0e309---dewejazevizuxireraketu.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/fec3abedf5b3467c49e96169685661ef/dolefutapokab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=malayalam+serial+applicationPDF 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_off00011a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13219 17600 bytes
SHA-256: ad68fdcfdd3d3155eac13b1eb411ea1bb3cbbcbd3615f205c666c58287a1dd58
font_02_sfnt_off00016043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16043 10644 bytes
SHA-256: c7a2e2281609ba0502c93f108b899f5c045f08a4c0e07115b2f1a9154effd9fc

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