Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2e8cb7941df486…

MALICIOUS

PDF

103.6 KB Created: 2021-06-09 06:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: be16fbbb461a0d973ca7bf83a16f4492 SHA-1: 43fa06fd8428540f1c425c347e93ecc406572c54 SHA-256: eb2e8cb7941df48679c193077fac96d6b2b896bc1987dec1ee78b39b985a4ca8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The primary external URI, 'https://allytemp.ru/pbw?utm_term=shiv+tandav+stotram+lyrics+in+gujarati', indicates a lure to a website disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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 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://allytemp.ru/pbw?utm_term=shiv+tandav+stotram+lyrics+in+gujarati PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd1bffd3f008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_605bb615171f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fcece63a98ae.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/dewuda_leziliwuwuxo_xefutajetem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fefb8b31c984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_606524d93b321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_602ac1a3acbf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467003/normal_5fce35858220d.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/lopegadofor.pdfIn PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/jaxujodumomiso-zupumavenu-mavuzupuz.pdfIn PDF document text
    • https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/cc6a5e16cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_6023cbd91a0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_6030dc617a964.pdfIn PDF document text
    • https://fixajunize.weebly.com/uploads/1/3/6/0/136051507/dasazid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://seromazu.pbworks.com/w/file/fetch/144679278/reported_speech_indirect_questions_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effcfbf3-12b3-4dba-a91a-504ea319a19a/nemudikig.pdfIn PDF document text
    • http://farejutotej.pbworks.com/w/file/fetch/144533640/coreldraw_x7_key_generator_free_download.pdfIn PDF document text
    • http://zafasuvolo.pbworks.com/f/33204091816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3d1620-c271-4461-b5da-f077100a0ca4/wafinelofilolepivapofeked.pdfIn PDF document text
    • http://sodogugokaf.pbworks.com/f/73479816746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd6013f-c829-4e70-89f4-cbbd0efe3940/the_immune_system_peter_parham_4th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebeda81-46c7-4aeb-b76b-7288da4e42e0/21694400455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e92676-e917-4215-9278-0c08e1b616ef/how_to_apply_for_medicaid_for_nursing_home_in_texas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358B 3160 bytes
SHA-256: 75ae12300092be9c4dc424a969d4affcbcea982f50756b037f0ec66543865ea7
font_01_sfnt_off000140da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140DA 5696 bytes
SHA-256: 3a8c4c128ed0309d0f1f78fd46b070aa7b31754d300b419392df7638c56fcb5b
font_02_sfnt_off00015423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15423 13192 bytes
SHA-256: 413902894b00c29389caa0253ebaebcada9d60e5b3df357094db8334250b8d20
font_03_sfnt_off00017e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E05 4636 bytes
SHA-256: 7f81eeb4c91a58ca7107fc1a43609dea5f85fe5c11dfea3ff84728dae255f842

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