Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd3e319c80a66f1…

MALICIOUS

PDF

88.3 KB Created: 2021-09-20 07:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 72502f96bc378b6ad23da5a4459e8e42 SHA-1: 68a1d5ddbdc5a14d6e32b46bd01c0c655a6b3918 SHA-256: abd3e319c80a66f11850ef86709ffc9b142fbd214fcbe3de15fc1033b901dbc7
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, forming a link farm. The presence of 'utm_term=gta+sa+mission+download' suggests a lure to trick users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=gta+sa+mission+download PDF link annotation
    • http://swaptoys.org/ckeditor/uploads/files/20961418.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/17762350421.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d02e75012---jupimoz.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/puduled.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/92677726089.pdfIn PDF document text
    • https://blugarden.eu/file/miwasepenasavofiginilin.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/rarup.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/vogumufis.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/38084751786.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/515c0997ac463ae68c65104e6db6a267/382204625.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/fepapolisapewulebuba.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/zumagevelalukadizefix.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133255dbffe8---nigazu.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/zaganew.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/vesotanulekekotolesat.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613305cb4bc95---80679096557.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/26346771798.pdfIn PDF document text
    • http://trubaopt.ru/content/file/79044037279.pdfIn PDF document text
    • https://loyd.rs/images/file/badafupijakufax.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/55364273551.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/51345018194.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613344335c056---sujadojusepinarotumomuf.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/lofitabunonijubu.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/zedaxuroli.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_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10300 bytes
SHA-256: 1f3cbff0e49b23dc6ed0e714efb96adb22ac4c7005a6a7e9eb1234a89a927402
font_01_sfnt_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 17264 bytes
SHA-256: eb59641ddcc03f189e63b1c5f152b0e92e9cd70e6cf18cb24b646605398fe8d7
font_02_sfnt_off00013b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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