Malicious PDF — malware analysis report

Static analysis result for SHA-256 001da980901e52e0…

MALICIOUS

PDF

89.9 KB Created: 2021-07-25 10:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c57f45200daef2f78192985eac6fc4a6 SHA-1: 53c0b68b7e53ab459bbe054b0ce6f137cf3c59f4 SHA-256: 001da980901e52e02c6f3d0c4088f8e3ec2e0ea5bc806e9ea6791c74e0af4036
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to multiple URLs hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit users through these links.

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 http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf1dc6683---38806986718.pdf In PDF document text
    • http://inwallendorf.de/userfiles/file/wolufogusadogunakerafe.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160b48bb5d24e9---migiku.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1423109d4---28689839930.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a586f504a4e---76053826010.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7a0569c9---vegidademotajave.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/44394359214.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/94715691849.pdfIn PDF document text
    • http://df-foundry.net/d/files/detelesifanagiges.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/1a8682ed849df615153b47b24704e21b/foxefesunuxikupixu.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b383064b7b---zekosufajegiraru.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/zoxarurolexivetukomesod.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/61519557000.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/mimuse.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b523493d6f4---34497795732.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/76895906906.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160e1361b74353---voviloxepuluvunen.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/pepuwigerevasumijopavi.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/ditupuzilikek.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/tutuvuxaxokalisovupeni.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/56590751846.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/72181982889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=libro+matematicas+1+secundaria+sep+pdfPDF 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_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 18160 bytes
SHA-256: bfa6d80d7897a458bfcc4c76251af3d1872ca0cad60b51fefcb45e2496da503b
font_02_sfnt_off00013ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 10984 bytes
SHA-256: c099b1cedeac37d270fa410943fd64be85da645e38b2898343a6d4e55fa2a0ae

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