Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6640193fc80e75…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 13:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53d0fa6a0d86ad8b47861f9e51917730 SHA-1: 59ec9abb8ebc635cd33b7f3d6c9248dbfbe55c6f SHA-256: 0c6640193fc80e755e9195fee09a2d59aeef787f616a4393a470ac9a207ecde9
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 0.9995

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://jumiwimov.ru/123?utm_term=call+of+duty+mobile+garena+free PDF link annotation
    • http://beririka.scienceontheweb.net/24160784148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_60443ee154e7d.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/25340862118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fe1aaabac55c.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/budidaya_bayam_merah.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/interview_skills_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5fe6336a2c077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_602141aa40e63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5fee7d53d7249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fed76ec8a6d8.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/infinix_note_4_price_in_kenya_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_600d54dd40473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465905/normal_604ecfcfae105.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/50083072629.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://uploads.strikinglycdn.com/files/50058a7e-2703-4565-a61b-28b79421d7f0/breville_toaster_oven_pro_reviews.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/pivitozapupilowos.pdfIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_4d1c7602430b4b05aa36c50d5cba8cae.pdf?index=trueIn PDF document text
    • http://bumurulepowele.myartsonline.com/cardiac_syndrome_x.pdfIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/how_to_breathe_during_gym.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c0ed7b-d245-4c2f-bee3-307e9bd10bcf/93791253842.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_f2f841b4e69148b4b649e8b380789e21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfe31f6-d9c7-4708-82bd-172eb5fade26/70636718451.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_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 5196 bytes
SHA-256: 9368431a0c4459f12220aff5ff587af7cb7abeae28c659aa93ca18cbbaee9db9
font_01_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 11244 bytes
SHA-256: 9cf0a56ccdc98bdddfc3fa2db34b0e7ffa46f7904e3ca5c7fb1674d159d97a52
font_02_sfnt_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2