Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd48e69e499983a…

MALICIOUS

PDF

91.2 KB Created: 2021-03-13 17:29:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c101c21bb8cb2e229045c390a39dc2f SHA-1: eb1e8f6b6cc0c5ab29250dcc894fea9817d8e0f0 SHA-256: ecd48e69e499983a89bfaa635f40209c8840f1682a2b1508ee95ccd23f728a45
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, identified as a link farm, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially obfuscated, suggests a lure related to obtaining a private investigator license, which is likely a pretext for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+to+get+your+private+investigator+license+in+ohio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476010/normal_6026d5b952b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fe558262d86d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_603e784e2f89d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_603e754086a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_602d6b27605de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_60112a6db3904.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/vodeladedud_pakawofo_repuvan_tizedarezowewew.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/bekuloxikujagotoki.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/midukur-bikazezom-wemuxuwazito-nevonuvaxizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_5ff994e614839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd1e1b9c8d29.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/9837513.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/817c401e-ec28-41f3-851a-31e914dc4ab9/22191035372.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/folevudadaluweduzuzediwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065a548e-0020-43e8-a161-3ce29579be0a/ziraper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2aeb14-64ce-4fc8-9346-6b57aa47a1ea/can_i_book_a_road_test_during_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ee1cb2-9e8a-415e-a8d1-c3e4faab9346/marujofiruwu.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/19093907566.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/jararenadigape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af2aadb-ee82-4d81-a48f-a7018d64cd4f/actron_cp9135_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/infographic_template_illustrator_tutorial.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_off000125fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FB 5408 bytes
SHA-256: 466b9ed8a353688867fe3c3c5d5587a794d0c7525bd6d490073e0a5049e934dd
font_01_sfnt_off00013879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13879 11416 bytes
SHA-256: f96434010ca69379f0b941b150c7a94a43094a45f7ad5a1ac191bd1b80793dd6