Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca05f6389d6754e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-06 22:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd7de2064c69321e13a9ff60d7f846f8 SHA-1: 541d3a31bf4c928ab9e8e3e2fe6c00867dd6d100 SHA-256: fca05f6389d6754e35ef44cc7928e2d98a17dad4e632aa84ebb6254ff30e691d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://fokemale.ru/wix?keyword=hamilton+beach+countertop+oven+with+convection+%2526+rotisserie+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fddf55f9eeb0.pdfIn PDF document text
    • http://urott-hu.com/harvest_town_gift_codes_2020fl52i.pdfIn PDF document text
    • https://libizegenumejav.weebly.com/uploads/1/3/0/7/130775388/4f745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_600216bfca0f2.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/jsxNqG1/loratererozetunakebofadew.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/2891181.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/giP7uHS/pegasus_flight_release_dates_2020.pdfIn PDF document text
    • http://tehnotop.store/miya_bhai_song_2018_mr_jattv558x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_60298e84513b8.pdfIn PDF document text
    • http://memoxilebuse.22web.org/vexenagupivewedusaxinur.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/sijdr0b/19207469673.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/nofededek.pdfIn PDF document text
    • http://zaralutodunuwa.66ghz.com/systems_of_equations_elimination_method_worksheet.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/velufewudexu_suzubiju_muzunewaja.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://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_6ab01028e4d4471a903197f6e62b9365.pdf?index=trueIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_339a604a9aa44de5a96121cf2e05e720.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_b8410ce367d747618fc87f3bf0342f03.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 5128 bytes
SHA-256: 11b6f82778283cd73141f3bf37ad8b4ded1a4736b16273b8613f9caca71afef4
font_01_sfnt_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 11356 bytes
SHA-256: 9af2c7989909aaea0fef0a1c2550aad0d5e88ecfc43b5b32dbf4b5fe37f46869
font_02_sfnt_off000126b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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