Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b126db5644df14f…

MALICIOUS

PDF

103.6 KB Created: 2021-08-10 21:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a1978b204d854fe1a4e1c36f96a55405 SHA-1: 4505be3ca5f10da183b5535e4898facfe6359d3b SHA-256: 9b126db5644df14f58ac9b09bc24c03c1d3116a5ee1e359d3a2d672909cd7dac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=man+and+superman+pdf+drive PDF link annotation
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ee945d054614334d9138dbdaef8482ff/13814265060.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/21518777061.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/27d3ed3d92a786eea67348b38e590c20/30578091216.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/nuahfi9nb4uds1assh5ktiisl9/77407027622.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098af8fc7406---pumajekudefamabunuboxo.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/desozopip.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/toxisopuleva.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/37649510026.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160722b74b3b73---bolunaraxokikodatetigipu.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_8FDB386D7583A476.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/63881668688.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/6387393582.pdfIn PDF document text
    • https://maintogelonline2.org/contents//files/47506453198.pdfIn PDF document text
    • https://parkettworld.com/upload/files/vilegasaxokuganibodudu.pdfIn PDF document text
    • https://medtek.vn/storage/file/58310544381.pdfIn PDF document text
    • https://parc-hotel.info/file/sonanip.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/18d783263d8e129c2cf15e197f7d34d2/36995790834.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/92e765446fabd9f90ba442ca35e85594/19524609697.pdfIn PDF document text
    • https://chornakorn-packing.com/ckfinder/userfiles/files/tusebapozupomot.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/61634201811.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_off00013046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13046 10552 bytes
SHA-256: fa3ce9f371d7b6637192897568e494bc9c41c4faec96726f4f673b6a6a7108b6
font_01_sfnt_off00014843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16055 18388 bytes
SHA-256: 6eaafb896b7832481d5b3a639aa87a774949eb8898e599118daf9a340d432e91