Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c663addb292c36c…

MALICIOUS

PDF

79.8 KB Created: 2021-05-10 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3638bd372367454130d632c8ef7c59f1 SHA-1: 75202780a9dbf6349eea1014311680452ff35136 SHA-256: 6c663addb292c36cf885416564348b53d844adb056f8c34e3a2ee67bae2e65c1
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 0.9990

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://midufefew.ru/strik?utm_term=sedona+method+training+uk PDF link annotation
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/644ebd32b6.pdfIn PDF document text
    • https://menusopam.weebly.com/uploads/1/3/4/5/134597334/fapoxuros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_6052ea0f0cdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fd8e712c1e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fd7caffa099f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_6035819e18264.pdfIn PDF document text
    • http://tigesonepovar.66ghz.com/pazegis.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/8061727.pdfIn PDF document text
    • https://kijapipova.weebly.com/uploads/1/3/1/4/131407887/tetitutolavu.pdfIn PDF document text
    • https://tufulikuzusader.weebly.com/uploads/1/3/4/8/134866114/3ebd4c204.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
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_9b0503ec1a7746cfa6bb7b2d25d41fc6.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_f73e1ff65b8a4e5cb05f1c799ac57d19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a128278-d695-47fc-8d7d-911056fa1467/27052911137.pdfIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_87e25cc164d34336a13dd8040b553d0d.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_0d69391f439646f99aab7368162e8733.pdf?index=trueIn PDF document text
    • http://disupenepoka.epizy.com/33185350836.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_450a5137ee2e457ab1ffd1389f231ff9.pdf?index=trueIn PDF document text
    • http://luzutajezilako.rf.gd/career_cruising_login_information.pdfIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_be50c235922c4f0ebf171641eaf4fbe3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9ea2a5-51b5-4880-9788-6766ad1a723a/damusatesesadefi.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/55162992460.pdfIn PDF document text
    • http://redufowoloware.rf.gd/biological_science_1_and_2_free_download.pdfIn PDF document text
    • https://e4c06157-4c4c-4c30-848d-1ce07482e123.filesusr.com/ugd/99e070_9bd8ff7cfcb34e57a2e2275e935bfb5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf6d5db-621a-42e5-a1f2-e1f857e584d6/the_killing_of_uncle_sam_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 5080 bytes
SHA-256: abfc83f121c9feeca872847b0659274571178b1e9c47c285ba30acf756ff43a6
font_01_sfnt_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 11196 bytes
SHA-256: 3f1ae7ae6a5e8732fabae103ff63faafff9662de59b0922bc96ff18e113a11fc
font_02_sfnt_off00012189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12189 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361