Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a30e8b917c8dcb…

MALICIOUS

PDF

85.8 KB Created: 2021-03-21 07:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0fbaeae2bc1067fdd0e0e2c7bcc4f578 SHA-1: 5b4b56870993d819982210929755623cb841c334 SHA-256: 59a30e8b917c8dcbcc94126ff27c00111b8adb8ca7ff93e62adee8a9ea8f4542
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 0.9998

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://pelibifir.ru/wix?keyword=magnus+chase+hammer+of+thor+pdf PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/hiiebji/school_management_system_using_linked_list_in_c.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/ghCSOSp/cristiano_ronaldo_free_kick_champions_league.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/q_see_camera_customer_service_number.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/jghiCoj/85803117444.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/1485618.pdfIn PDF document text
    • https://cdn.sqhk.co/kukelagalefe/g2uhcPo/vasakuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/gdhjgdI/dog_dachshund_toys.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/gLhdice/56873394736.pdfIn PDF document text
    • https://gorelafuxom.weebly.com/uploads/1/3/4/4/134497365/4943ba837b.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/hgIgftO/13470372755.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/Kjgijjj/temple_run_oz_apkpure.pdfIn PDF document text
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/7e3399505728a4.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/7iaRjfQ/love_live_groups.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/54725908943.pdfIn PDF document text
    • http://retamos.mygamesonline.org/dateboziduwimarufor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_5ffc58e53f14446d92a0fdad028329c6.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_eb68dceb69004b85a42cdc56ede7599e.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_a71863a197e94e8f9da320001e385411.pdf?index=trueIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_ad61ab0c40844dc5a3939c030f577ec7.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_82b7fd3d97154be3a8643a234d6c29ff.pdf?index=trueIn 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_off00011134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11134 5544 bytes
SHA-256: 1ce5f7aa9924adc3e1e5ffd81a9cad2a07c82e638e0c3f7cf7f28132edf541e4
font_01_sfnt_off000123f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F1 11176 bytes
SHA-256: da82a7c5599349aa1238751c35d8363b858f27ebe636ba1cd75f27d9acac4050

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