Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d296a926086076…

MALICIOUS

PDF

89.7 KB Created: 2021-09-06 11:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 843a5f6f7c5d0bde9496eee8eab49dc5 SHA-1: 561bd6aa0ecb88a0248cb6302461f1312582521c SHA-256: b0d296a926086076201b8d58763ddb68cf2e95b205a7c719b409c018becf4fe7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress instances or disposable domains, suggesting a link farm or phishing lure. The presence of these links and the overall structure point towards an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 https://chcial.ru/uplcv?utm_term=como+juntar+varios+pdf+em+um+s%C3%B3+foxit PDF link annotation
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160746f172fe0c---revajitavakemupitigogode.pdfIn PDF document text
    • http://renovator.cz/files/file/6625353137.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/juseruwopedozep.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/57659961976.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/xatelovebazi.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/77327893537.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082c19030766---29669610622.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/mopexuwagip.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vizozekafefogisuka.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/jadefodarejupelodixejafom.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/lubovawinorelinavij.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/934a7c3461097ef4f9534cb89d130a6c/55917862090.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ed79de39---31622650976.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102db007de69---jerogosujufewunimuvujeja.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/buzutavop.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/14451978671.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fdb614e571c9dda7e25852b630637a89/70185966821.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a5ef5164e---51349967366.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/nibujiwuponozivi.pdfIn PDF document text
    • http://blackwingsexpress.com/upload/userfiles/files/tuwimuxiritibaxikepij.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606e83101e207---58618248062.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/bt5rk1vsmh2tg4kle290nddki7/8289845464.pdfIn PDF document text
    • 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_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 11180 bytes
SHA-256: 38c8221a81ea8f26cf2caf1b11addd265a5ca34b38b59b84bd52b7612800cdc9
font_02_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 21900 bytes
SHA-256: 38894c1803ebb8738d689c44140062d44b2dbe417b0a2925179d33fa94a9f1f8

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