Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabdf58faf1af6c6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-04 06:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f91ca3877d6ceef177bf4afd4d779141 SHA-1: 8c1bb2f567fb5302655df65e9411f6e9d8e9d8a8 SHA-256: fabdf58faf1af6c6e116c0639b8dcc367a6bd21c0f79b463233590229a33caf5
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bae855dd408---26380901230.pdf In PDF document text
    • http://proxima-design.cz/files/file/39043488409.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079562ee1fa9---91926484302.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f86fd9a9edc950a54113188a6032b1c1/pakakugenovejese.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/94093925868.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f3c40d5c8eb---18468329350.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/91293423483.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cc147cdad1a03ee5f6f5f32c70e8b064/tadebiwapulezab.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/35253323763.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/78536117562.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/67428833494.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/xelipolebajedudasipuzew.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/80685187726.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/94001865406.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/vogovofefowezigebub.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989b62c5ece---tunagimabuvunupevagariw.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a6478ac324fc117a1fa7927f95c762dc/89265020213.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/padumopamewatosafinoni.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/soxerifaw.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/99291887458.pdfIn PDF document text
    • http://stratford1980.com/clients/1/19/19838be1bbe5684469623718d5e25b5d/File/72284739765.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/zobolapenososoxez.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/32510469234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=jcb+fastrac+2170+manualPDF 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_off0000d331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD331 17144 bytes
SHA-256: 06cc08d15a03ad3f27406e116b5fdee8f0891f01c4b112423b87521455092fe9
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 10728 bytes
SHA-256: d0013a36929985d5b1b1444f7926113d50f02205da6f48f44421970c3ecaa030
font_02_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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