Malicious PDF — malware analysis report

Static analysis result for SHA-256 f163e72ca5661131…

MALICIOUS

PDF

79.0 KB Created: 2021-02-28 09:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ca95a5f9fe8ec5de9b38d07179bba082 SHA-1: c064d42747ee3ff26569d28c6c7a7c7871f1754d SHA-256: f163e72ca566113158e3d2aae796fcf86ff4561b1ff2f2a3f897d35500d8bdc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=artemis+fowl+%25282020%2529+filmweb PDF link annotation
    • http://outputqwvk.space/avaya_one-x_communicator_auto-configurej0t83.pdfIn PDF document text
    • https://mepowubufavi.weebly.com/uploads/1/3/4/8/134858245/bubavobodokugevebi.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/ijPzjel/67893246482.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/tasikifitimubupaz.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/ia0gjjj/talk_video_sharechat_download_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/cCibDmJ/16115498874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_6022d2bc63297.pdfIn PDF document text
    • https://vuterezupip.weebly.com/uploads/1/3/1/3/131380942/4299520.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/imagenes_de_caras_emociones.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454424/normal_6027eb50d280c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_6000b6dfcb3c8.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/nursing_diagnosis_book_apa_citation.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/JiaThiU/lesodepaxejaxelakag.pdfIn PDF document text
    • http://mmuuue.space/miwemulexavijezonitese464au.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/vulekitavu_sarutitefer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_600a4e87d56ce.pdfIn PDF document text
    • http://noncomform.space/clinical_documentation_specialist_interview_questions_and_answersxou91.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/bujasarivodewu.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
    • http://tigagatu.atwebpages.com/dominos_wisconsin_6_cheese_pizza_price.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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 5036 bytes
SHA-256: 22de0ec1aed3a66301b8e2d87a5b71f03ae012b58c1ebfd51cef938664e85fe8
font_01_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 10180 bytes
SHA-256: 35ab74b14355b38f6c8042dba23cd2d02cb32274e5e7f90527c30dbf7a40a91d
font_02_sfnt_off000120ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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