Malicious PDF — malware analysis report

Static analysis result for SHA-256 c774c3a95dfce455…

MALICIOUS

PDF

72.1 KB Created: 2021-03-28 13:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd2a1ba8ef3eea7d041954f7dda537a5 SHA-1: 108df61c1763fd123b35b681979793b0ee9a834c SHA-256: c774c3a95dfce4559f60d1d4f68408bc193136a12c3c2b50e0351ebb234d6a06
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=belfast+city+centre+map+pdf PDF link annotation
    • http://wunuxuvi.sportsontheweb.net/solid_waste_management_file.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/9263165.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/louise_hay_meditations_to_heal_your_life.pdfIn PDF document text
    • https://kilifunilazavef.weebly.com/uploads/1/3/4/4/134481566/pikigelemopen.pdfIn PDF document text
    • http://panivupod.22web.org/xevowigup.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/94149097364.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/ankush_raja_video_mp4.pdfIn PDF document text
    • https://visitbelfast.com/plan/brochures-and-downloads/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voferumupisefag.rf.gd/australian_dental_association_antibiotic_prophylaxis_guidelines.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_0b6fde92db09453791ee2ea1d4eecf5f.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_652621e339ac42beaf3a7c1eaa1447c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pubopelej/dulolipiluvorasugobokija.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/nukixodemusagorulazutab.pdfIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_411564e2f1404d5485b14d5c1829d214.pdf?index=trueIn PDF document text
    • http://mawarine.epizy.com/clarion_cx501_price.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_e08aeaff47b547c5b50bbe5837e0a33f.pdf?index=trueIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_c92e1905d6604238a8ff30b5aec802d4.pdf?index=trueIn PDF document text
    • http://luzoxone.epizy.com/organized_crime_howard_abadinsky.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_fbc80bfdee804d619d5bbdb605b6c001.pdf?index=trueIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_6f625b2f55df448485eb1cf0e57e4251.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/vuzaxipamifo.pdfIn PDF document text
    • http://murapimopavopa.myartsonline.com/bujinejeramal.pdfIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_0947e44eb73d4cb88b51519bb895291f.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 5452 bytes
SHA-256: 670c7c54edb77e0e8a48cc2195bd78c77a1f51876afe0c19458f89454f591cdb
font_01_sfnt_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 10572 bytes
SHA-256: c065561d6fcf2cc52907cc49a13b4149d48217594483516ed4feff50c45fce99