Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe247fc96619b4c…

MALICIOUS

PDF

75.6 KB Created: 2021-05-22 11:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4ad2466e2784c99b35171a2813f6f4a6 SHA-1: 12ad4f43563fe438ba209c234c97f581841cfdea SHA-256: 5fe247fc96619b4c54d36456d3f56fc2309bae0efe4ed0ec238731303c3628eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=basics+of+biblical+hebrew+workbook+2nd+edition+pdf PDF link annotation
    • https://sosuxivi.weebly.com/uploads/1/3/6/0/136056733/3696516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_6062f90427500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fdd92292d741.pdfIn PDF document text
    • https://vizifeji.weebly.com/uploads/1/3/0/7/130775372/ditererulabebugerox.pdfIn PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/dinogimexugav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_60117d529e6a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_600e0c08400e7.pdfIn PDF document text
    • https://webonuru.weebly.com/uploads/1/3/1/4/131437172/7975458.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/xowuje.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/lisewuze.pdfIn PDF document text
    • https://fazuzuxidugijef.weebly.com/uploads/1/3/4/4/134475184/lulog-ruvezu.pdfIn PDF document text
    • https://kukegogefip.weebly.com/uploads/1/3/2/6/132681459/4f723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_602baf39039ca.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/e085c19d-c103-46f4-bb87-c03dc18bec66/squat_from_knees_over_toes.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/dosedegumatofopesowizor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f138fe-f8f4-481c-8da5-a01b22a4e1ae/ncert_maths_exercise_6.3_class_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72d8def-00bb-47db-be02-65ab03c6fc41/mrs_dalloway_full_book.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/autohotkey_recorder_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/barber_of_siberia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c910f96c-b0ad-410e-86ad-da07b6350adf/2011_dodge_avenger_mainstreet_price.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/why_are_conflict_resolution_skills_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a44f8c-ea16-43f8-a2ee-8ec3ec661325/81684291171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c175e5-87f5-4959-8c68-5363d10b7f14/writing_contests_2020_no_entry_fee_april.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7026f774-5694-48ca-9e5c-4f3b8920cb7b/the_gospel_centered_life.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_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 5720 bytes
SHA-256: 80188d44586cca23699f5b04b786aed03937b9fca1b6fe0fd82c054ccdf0b917
font_01_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 11472 bytes
SHA-256: a597e82c657ed554754300d044bd32f347f405b8b5243939024078f7dccc4555