Malicious PDF — malware analysis report

Static analysis result for SHA-256 01935f007a967d95…

MALICIOUS

PDF

75.8 KB Created: 2021-05-10 01:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c70378132cd815733f35bfd5bb116fb6 SHA-1: b32d01b7316a42a1134f8aa08fbbb7788566cd80 SHA-256: 01935f007a967d95b35190835e975d7b39b6983becb4c1a0402f5e785d21a5f9
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 0.9999

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://leonvi.ru/strik?utm_term=how+much+does+a+sharp+65+inch+tv+weigh PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453560/normal_6009a300e9ff4.pdfIn PDF document text
    • https://kerimoseb.weebly.com/uploads/1/3/5/2/135299904/zakubona.pdfIn PDF document text
    • https://sodukosikel.weebly.com/uploads/1/3/4/5/134598711/riziletilapas_perorewidiridef.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/0c3b2c.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/974085796438e7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_60526c5787e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fe98060826a2.pdfIn PDF document text
    • https://miruvogix.weebly.com/uploads/1/3/1/4/131408245/420130db4786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_1e8e2e5ca91148cba73f30905b8a01da.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_bdf3918aa69e4a71b2433a0d1eb84350.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a16bae-6af8-400b-bae9-f3cd8f6bb6ba/kenmore_elite_dishwasher_665_diagnostic_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891cf73c-be58-4705-b867-300876a6243d/the_warlocks_hairy_heart_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3d3364-6e44-4567-88f4-9faf7d8395d3/how_to_replace_heating_element_in_maytag_bravos_xl_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7f6c56-fff0-4378-8998-bd6917a90cdb/japobinir.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_529408530b314efebacc15eebe340e82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15444209-725d-4e1c-add2-3367013a8b3f/cant_install_realtek_audio_manager.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5844 bytes
SHA-256: 7015c4f3ec71538873c1f3e6818a30357958c0ad2532304effbfa1609a1c3c53
font_01_sfnt_off0000fc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 11148 bytes
SHA-256: 172f1743e0ac06187714bd676ad1b1040ae0f6be782e07fd52d4ac82be65a110

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