Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8c1e4833d52ddf…

MALICIOUS

PDF

81.1 KB Created: 2021-05-30 23:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 934c0c146a16eec60a5feb976b99b87b SHA-1: 723e0dc0f5f885a9afec0fa2d20de3e1d5947327 SHA-256: 2f8c1e4833d52ddfeefa7d7fd63db1401dc05b344fc4246e3b1753f758f5056d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or phishing campaign. The embedded URLs, such as 'https://soxebez.ru/strik?utm_term=samsung+galaxy+tablet+charger+cable', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/strik?utm_term=samsung+galaxy+tablet+charger+cable PDF link annotation
    • https://wutesubigu.weebly.com/uploads/1/3/4/8/134893167/1491618.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/4031663.pdfIn PDF document text
    • https://bubituzujolumet.weebly.com/uploads/1/3/4/6/134647672/jepoj.pdfIn PDF document text
    • https://kekipefawaro.weebly.com/uploads/1/3/4/5/134588225/66573275b.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/4865300.pdfIn PDF document text
    • https://kafigibedup.weebly.com/uploads/1/3/4/4/134479504/tesinapefivamoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_605203d85c782.pdfIn PDF document text
    • https://suxaposalepet.weebly.com/uploads/1/3/4/6/134677753/6346131.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/matafarugejetumojape.pdfIn PDF document text
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/7945013.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/5028270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_603e1731e1441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_605569a9215b5.pdfIn PDF document text
    • https://bakedimilero.weebly.com/uploads/1/3/4/6/134609665/zazaki-xedenoketuzazez.pdfIn PDF document text
    • https://xawefiku.weebly.com/uploads/1/3/4/7/134753490/zisoniva.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/6ac632dd2e54.pdfIn PDF document text
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/8507328.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/3538232.pdfIn PDF document text
    • https://juvejisedebuz.weebly.com/uploads/1/3/2/7/132740880/b45684a41362.pdfIn PDF document text
    • https://xipesefilugupab.weebly.com/uploads/1/3/0/7/130740566/tufexirapepefutuz.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/3d6e249c-3497-4b36-b57d-1b32b99be026/similarities_and_differences_between_c3_c4_and_cam_plants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d35632b-5996-4d9b-ad06-0df619982aeb/isoquant_of_ces_production_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb567d1c-a320-4cb2-aad0-1db4fc978f67/how_to_calculate_alpha_and_beta_in_excel.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_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 5352 bytes
SHA-256: debbd0f2ac5ac24ad3e117be4fe411b644103d689ed9851752fc82dffb324b7b
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 11224 bytes
SHA-256: 5b6fe5f60b47a8d5b836b2950e8da3cfe77a313e32f3074e8697d92f8ab4879b
font_02_sfnt_off000128d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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