Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f2b2eef22c38f4…

MALICIOUS

PDF

73.2 KB Created: 2021-03-09 04:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2bed635ccb0dbc043bfa784917bbb488 SHA-1: 0e2a3508ce0134006e9dd05faf3c162b8bb4f51f SHA-256: 75f2b2eef22c38f43b29248f436e8cb203ecdcc2322ebc04675898de2ef69d39
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-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://pelibifir.ru/strik?utm_term=truearth+healthy+foods+case+study PDF link annotation
    • https://cdn.sqhk.co/kawinojos/UwsJnig/iron_punch_mod_apk_android_1.pdfIn PDF document text
    • https://vudemigubujesi.weebly.com/uploads/1/3/5/3/135300151/3800553.pdfIn PDF document text
    • http://com-servers.online/dyson_dc35_filter_catcha6wl8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_602141827506a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_603edf478ec18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5feefcf88cdad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5ffd518aeae9c.pdfIn PDF document text
    • http://normab-id.com/rukovutujixel2wbea.pdfIn PDF document text
    • http://ital-tess.space/zanelasazumcvia.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/3jgC2gg/8786188261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6008d49fa0787.pdfIn PDF document text
    • http://sluzhba1.net/bugiwatefajelelv8bir.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/bhi3ib2/vitamin_cottage_fort_collins.pdfIn PDF document text
    • https://gabavogafev.weebly.com/uploads/1/3/4/0/134000006/pavuwiwatiji.pdfIn PDF document text
    • https://papekukikaduli.weebly.com/uploads/1/3/4/3/134361343/fadilezo.pdfIn PDF document text
    • https://viliwefat.weebly.com/uploads/1/3/1/0/131069961/4911112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/figidireki/american_made_2017_tamil_dubbed_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/29221449934.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rubobevukibot.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_213329e6b45d45bab66dd325712aa372.pdf?index=trueIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_2e35604cd8874070ab9e8b76e15cf12d.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5160 bytes
SHA-256: 068d38a0278e06bae438c027b2db9002229ef68a28e0a3b3f97292af0ab88403
font_01_sfnt_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 10116 bytes
SHA-256: 902644a1dbebbfb2f87eaa4cbca65322c99e587e2a32de309a510bd398a35d28

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