Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f7a915d98df103…

MALICIOUS

PDF

76.0 KB Created: 2021-04-28 05:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb8227665e966de273d54e764d82edf8 SHA-1: 7093cbb4534129d836660fdd99c79fcc8f09e58d SHA-256: 02f7a915d98df103e9337092d252d3adb766ab22f0eafb15bfef0d2ccedc9f00
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 0.9960

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://baarspo.ru/strik?utm_term=easy+things+to+draw+3d+step+by+step PDF link annotation
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/9601514.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/vofebu-xejaraxiloma-kanisinilisuf.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/851f7dec645.pdfIn PDF document text
    • https://gijosugomigul.weebly.com/uploads/1/3/4/3/134317853/62d137.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/3201551.pdfIn PDF document text
    • https://lurenejaxerugu.weebly.com/uploads/1/3/4/7/134728533/d3e8aa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530429/normal_5ffc1527a2917.pdfIn PDF document text
    • https://joziwofu.weebly.com/uploads/1/3/4/0/134012586/5f973d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602be72523a19.pdfIn PDF document text
    • https://wirimodarezekas.weebly.com/uploads/1/3/5/3/135314182/814847b54c7a86.pdfIn PDF document text
    • https://toxoxazagole.weebly.com/uploads/1/3/0/9/130969938/piranilari.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/jepasewibez_xukaru_ledeperudo_kubibisoxasob.pdfIn PDF document text
    • https://kawolusasemosu.weebly.com/uploads/1/3/5/3/135397741/rudeludi.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/8325f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_604ed8ccc2b10.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/boxogafagoladi.pdfIn PDF document text
    • https://pupizotewijuguw.weebly.com/uploads/1/3/0/7/130775862/kimujitipifarog-wapiwutimodolol-foroji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8168c09e-f9fa-4c06-951b-2032848e5137/69012997496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d121c1d-c832-4b4e-9a43-40ddf9f553da/does_raphtalia_die_in_the_manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265e9894-8ced-41aa-b06d-b01a04640d37/xevonarer.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/bittorrent_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10892269-29b1-43ea-8d6d-cf8660d85101/damed.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/62325180817.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/xuxifebupifarabaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/giants_causeway_guided_tour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478bf6a8-5d5c-46c7-ad13-d8b7ac11db84/how_to_clean_up_zojirushi_water_boiler.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5644 bytes
SHA-256: 9b9af35ea50aded93bbde70b55b37b66fe60b32e2813ac445fa6e8695807399e
font_01_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 10528 bytes
SHA-256: 48f920c57f9d86556597e6b95b0b2ead11b6661516140daf420216423ce142a3