Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b5f7edea7acdc8…

MALICIOUS

PDF

96.6 KB Created: 2021-03-25 06:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1f98a6afc40c74a4ba8bf762b18753b SHA-1: b8a0a711e20ace06382451c1f751a855667af05e SHA-256: 80b5f7edea7acdc8bcedaea851891b551485a5eedab91161fb40950966483baa
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 0.9997

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/wix?keyword=sample+profit+and+loss+statement+for+daycare PDF link annotation
    • http://xegizelodirirok.iblogger.org/what_is_waterfall_and_agile_development_methodologies.pdfIn PDF document text
    • http://mon-cmb.best/zewibedusobqf5.pdfIn PDF document text
    • http://magnetfix.store/english_for_everyone_level_1_beginner_practice_book_downloadpvy13.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/vobugimoweberow.pdfIn PDF document text
    • http://mmmuuuue.space/optics_clustering_algorithm_matlaby8kdi.pdfIn PDF document text
    • http://copyrightreports.com/660695740h4avc.pdfIn PDF document text
    • http://cheapestshop.xyz/darley_and_gross_1983su5a6.pdfIn PDF document text
    • http://reduslim-official.website/kotezrejx1.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/627505599709ootu.pdfIn PDF document text
    • http://mklhhhh.space/baldurs_gate_dark_alliance_gba_manual5wres.pdfIn PDF document text
    • http://getsalle.xyz/6263329172ycv97.pdfIn PDF document text
    • http://pakefuvinaput.22web.org/bourbaki_lie_groups_and_lie_algebras_chapters_4_6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_a8f3073bb1df47fabdd18e4363c25a9c.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_fb9464ab6bac4f769ec10f1dcb2eb90e.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_b3ca53b18aef4a0bba05830f9d5cbdaa.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_5d47cbee51b04123a9dd543f2fd6c521.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1319512b-780f-4a6b-975c-84a95540d02d/73100871808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5004e91-6aa7-4de7-920a-a47615a2751b/what_are_the_strengths_in_strengthsfinder.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_off00013437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13437 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off00013e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E31 5508 bytes
SHA-256: 26199a75af42823f46307565e4799db7292198f826b57c9db7f7e18cda017f4e
font_02_sfnt_off000150dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DC 10556 bytes
SHA-256: d0517b55e6e7dd7cbbe52c8ae3768c914811248bb4f1f05a901afe0894f6cb33

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