Malicious PDF — malware analysis report

Static analysis result for SHA-256 262d0e4e3dd69987…

MALICIOUS

PDF

94.0 KB Created: 2021-02-14 16:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ec73596e2f0ff2afc3de602470756fd SHA-1: 3c60b0876e114207c46fa2c6ddbb959319d753c6 SHA-256: 262d0e4e3dd6998780e999dd2868dd20fd60c3635b7b06afdc00ea404761cce4
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 0.9996

Heuristics 5

  • 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 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://jacksth.ru/aws?utm_term=chinese+alphabet+pronunciation+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384320/normal_5ffeacc5e9076.pdfIn PDF document text
    • https://cdn.sqhk.co/kevamubeminu/hbughec/80802421537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_6028949265000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_6025fcbb6fa4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff58db8518d6.pdfIn PDF document text
    • https://gepemizuwawufak.weebly.com/uploads/1/3/4/3/134335313/zupanolitov_toziku.pdfIn PDF document text
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/ruvobimitideporesuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5fe378be7f6f2.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/ifUibBs/nozepokevizosureredub.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/buputagamutoluz.pdfIn PDF document text
    • http://gojoges.iblogger.org/chromium_based_edge_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/je3bgjy/occupational_therapy_schools_in_texas.pdfIn PDF document text
    • https://pameduvexeligim.weebly.com/uploads/1/3/4/5/134579292/gazadejamobuko.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://zajozikudesurek.epizy.com/glidesoul_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/csgo_aimbot_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/wow_vanilla_enhancement_shaman_guide.pdfIn PDF document text
    • http://zudavowopo.epizy.com/65175384437.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_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 13840 bytes
SHA-256: aae3dfe1bdf394f74cc286d8008b330a1d1e2d27196d783a1401bdac9f21ab20
font_01_sfnt_off00011fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB4 5288 bytes
SHA-256: fbb7383bccc352a16c4c5090b3816790a340219a749f7ba1bc14f8479f903073
font_02_sfnt_off00013192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13192 13584 bytes
SHA-256: b3ba6d8ada2fc7391a82d2aa554b2b2fc2c39e9c7af71acd34fbb0d9042ac618
font_03_sfnt_off00015bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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