Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5e3062d78d176b…

MALICIOUS

PDF

79.5 KB Created: 2021-08-27 15:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0beb4e3d640eae41faada48607aa77b8 SHA-1: 32a50914d1f6675b9ddee45c4ec4c02873d0d301 SHA-256: bd5e3062d78d176b1ada2167c23c2e2b7aba07831fe47721992411fb708b70a2
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of multiple external URIs and a link farm heuristic indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6f285ff666d5be5c1f4f4cf8135fea84/68836811460.pdf In PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/13b81c2488793e3e0f2fb0bcf0f6c790/61852419647.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/72545858055.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/bb7fde9b7b1c934f149881873d17bb2e/kedudarapijojize.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/bewirijomam.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/64866454747.pdfIn PDF document text
    • http://stevis.cz/files/file/43380233964.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/jiwaluw.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/94364241790.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/87610032381.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/24e9c8ed1d5c61fee8410b7e54f49d83/32531010553.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/fokitamosakeb.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/tukuligowelusamutabeb.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/tazasevifofasaro.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/8274211086.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/20129130736.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/dojizeminusokawita.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/fukopaxipalu.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/64672519795.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/zixisizan.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071702664739---mofadolifonokenuna.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c93d7f68f47d0755c66beedcc0b88b10/5212093905.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/18050380647.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/foriwodalozomabigizisa.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0e04591bcff24c46fbe48c14cace54e9/90638589534.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1d64fdc0f0838aac609ab65173043e83/jetobovanoretiwijazoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=types+of+gear+trains+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_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 10704 bytes
SHA-256: 6416343b5f3967c1264d92f6d4b3fda644b42043a575df7ec4fdef122f139bfa
font_01_sfnt_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 17164 bytes
SHA-256: 40fd89a7a82d4c85f571cd80fd938030c4bb94e73ee4d7dbbc349e0bbabb00d1
font_02_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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