Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2ca364e23ee9f0…

MALICIOUS

PDF

86.2 KB Created: 2021-06-30 00:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d323bd7be9bb33c41a0819376e011bd5 SHA-1: 50cfd40e9871cb008a9ca3abc6497215cef4b10a SHA-256: 8a2ca364e23ee9f081aac9fb02b499241e4eb0996d246d71ac58e4b35a5cb3f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to potentially harmful websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=are+snake+plants+fast+growing PDF link annotation
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e3a2ce1eb---sasilidowolojokol.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e615d9e46---vonerevevogo.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/kco3aavtuvafvsgl2628h04n6k/bivipesafudobagowewigidi.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/bopumemamugetam.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/46887707150.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b137367f42b---3516797942.pdfIn PDF document text
    • http://z500.si/files/36664485858.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963f3756fb3---37813687445.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/jided.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/woxadixebufik.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/vs09po1g1u37ljgn9tfo195di7/6150434637.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/193310b95aebcf14160be9bda31229a1/77718107941.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/22404720895.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/51698793462.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41921e211---20462812010.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ttkas8trp6rlot0g4lm3a1oqaa/81075036077.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/gerobuzilejumonesobez.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021060806101224.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/salofonarapuke.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0811b32bb---nonezivajifokaxax.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/26430973326.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7143c236f6---69772732163.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de69b5a1e---48384217480.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/44453712764.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_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 17324 bytes
SHA-256: 4af5343e20b06d20c6517401fefdb67de818006e83c298a4f457db90fd4c3373
font_01_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 10692 bytes
SHA-256: 4e1be52551e494350d6bde56a4e472fb3489a9454c7aeb2eb2f67b9f169ec9b4
font_02_sfnt_off00013365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.