Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8ade6b215dddf7…

MALICIOUS

PDF

80.4 KB Created: 2021-04-19 18:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cb407aced90e8bfa8940fbb8b2e07210 SHA-1: c2d5d3993875d5c406da301f564bb5b1916000f9 SHA-256: ab8ade6b215dddf7c486b920a4eaf50ca2fded9e0b0d92e9ec0279f5ecb0e713
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://jottigo.ru/strik?utm_term=garmin+gps+48+12+channel+manual PDF link annotation
    • https://lukozosa.weebly.com/uploads/1/3/4/4/134485969/324468.pdfIn PDF document text
    • https://dexazime.weebly.com/uploads/1/3/1/4/131437554/gewuxawirabi-jebibigeruf-ganabeva-wopidalunezukag.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/sufovuxuwovoze.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/11488b34f16.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/awEghvF/tamizerubizenubizifosun.pdfIn PDF document text
    • http://good-production16.site/mumebup0bi7i.pdfIn PDF document text
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/suzegugazolawiwowe.pdfIn PDF document text
    • http://dutov.org/things_they_carried_chapter_9_summary9y6k3.pdfIn PDF document text
    • http://randname.ru/information_dashboard_design_by_stephen_fewqhee2.pdfIn PDF document text
    • https://cdn.sqhk.co/gokitoser/EdlThaI/portland_winterhawks_1980_roster.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/vovifow-gidugitalipale-pezilowukokumev.pdfIn PDF document text
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/depilijukurofanuw.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/fswZigh/resume_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/bxzahjN/london_stock_exchange_free_courses.pdfIn PDF document text
    • http://raftgjgr.space/filmywap_com_movies_2018_punjabitwmel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_7e5b78d9c70e476ca8ac2a739273e1f4.pdf?index=trueIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_44caecefd7f24f16bb4f9df7edb80769.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_535514d4161d4a138cdcd46e33b482dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/159707a1-5d54-47bc-bcf9-a8c6a9910079/33658313450.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_8497b98118e84e918a9f14b07334142c.pdf?index=trueIn PDF document text
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_6ec079ad8cd54cef946de807277160fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71886a48-f16d-4970-807a-0ed68b576212/tolikogaxaginu.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_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 5844 bytes
SHA-256: 903fbad5e0c49fb5fa31e1db823b8e04e098839512c531e547a3c90451b9022a
font_01_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 11308 bytes
SHA-256: f943bec2d65ec4344cf9895788d5e82abbe00dba602996d4b5f7b7e34ea523da