Malicious PDF — malware analysis report

Static analysis result for SHA-256 3047469d97609a28…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 07:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a17aa050ec26648e0c817aa5faeaeca1 SHA-1: 0be805f8b388eca51923a6fbea1956ffaf4c6f24 SHA-256: 3047469d97609a2826a7361ece5e8fe72a29d78a29dc4adabe858444ee86912a
226 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs pointing to other PDF files hosted on disposable domains. This pattern is often used for SEO manipulation or to distribute further malicious content, potentially including password-protected archives as suggested by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=what+are+the+best+aa+and+aaa+batteries PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/i8LEgej/lelonol.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/Tx0jdhi/footrock_2_mod_apk_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fe2be0a860a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5ff202e08e329.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/kuzozake_zesal_pofobo_molamu.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/drO6hhd/vaxevudi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5fcce932c8de8.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/1369440.pdfIn PDF document text
    • http://wekabamile.22web.org/how_to_duplicate_things_on_procreate_pocket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377391/normal_5fed0fa10db3a.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/Q8XwAhi/24191752398.pdfIn PDF document text
    • http://zapazereti.22web.org/28087921002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fdd787be6819.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/fikesoropizinitatamagexus.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/vibev-juzukagirinoto-xakoxopomitafof.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/hib5rhd/sabinivududibujo.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/types_of_csr_reporting.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/dusekipoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_60108cbdea51a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fd773862d8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478402/normal_5fdb0d3305a77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 4712 bytes
SHA-256: 750afa805ccb41c73e41b4c11a10a1050c7d03e84329c91a496116d61c97503d
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 10560 bytes
SHA-256: 48a1af74cb52c21e3977eff8ada1b155c2edaa504ab87ca827dba09ffe11240c
font_02_sfnt_off00010acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e