Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fcf0502d4ca5d0…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 08:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 656c5b74829616343b73e3e08c4d0e25 SHA-1: 7a6680499ea03507608859901598b8d25f8f791e SHA-256: 08fcf0502d4ca5d0b6c2ef869b3cfdcfe0294428d6c28144e2a662cd274b7108
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics indicate the document functions as a link farm, pointing to multiple compromised or disposable hosting sites, likely to distribute phishing content or malware. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://futurefacesmiami.com/uploads/file/silukafoxijez.pdf In PDF document text
    • http://albertopizzetti.it/userfiles/files/zojovuxevotali.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613718faee5fc---82226106799.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/94997964634.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16144e5370ccff---343982823.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/xitup.pdfIn PDF document text
    • http://bndweb.nl/upload/files/xivegupej.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/17003040951.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/74772315703.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/97829206332.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/90170255879.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/sojavopama.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/xonodenatoxidulumebo.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1630821845.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/gevibidazu.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/39522666242.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/57679665110.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/woxemujugukofoj.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/banurewegofakirifoputo.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a022ce419c---mesukebakezodidisos.pdfIn PDF document text
    • https://pcetravel.com/files/file/zawelibelazoxunowa.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/47961635214.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/xetomapolumalutifugap.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/88600586017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=vpn+brazil+server+apkPDF 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_off0000d3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 17152 bytes
SHA-256: 35747e2c47f793cc88682d3762a7d48c4cff139d19d82799e1d840fc543231bb
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 10352 bytes
SHA-256: 2ac418866686906570a948b7cf511a39445caeba57e536e6e843ea36a2559bd3
font_02_sfnt_off00011814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1