Malicious PDF — malware analysis report

Static analysis result for SHA-256 3164f9161740d64a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-25 09:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1043af76c40af59e2cbf47a5e244c98 SHA-1: 9b6c8b5cae01e79476651cebf196417e9e95fc2b SHA-256: 3164f9161740d64aabcbf6558d82ce057d8ce3e1ea1686208631d01ec810d380
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://leonvi.ru/wix?keyword=complete+psionic+pdf PDF link annotation
    • http://help-verifiedbadgecenter.com/retokevegevimoxuwefotifuzj8y4x.pdfIn PDF document text
    • http://fineagencyy.com/afterglow_xbox_one_controller_setup7mpq5.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/fmv8l6s/taboxitakawazebuxavukexe.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/7314702563421tz9.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/25571753796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_6011ee9e7d1f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480588/normal_5fdfb32a4d88e.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/bIzgja7/germany_shopping_stores.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418013/normal_5ff5089f0ff14.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/passive_all_tenses_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/Ojfjaig/lenaxasafom.pdfIn PDF document text
    • http://hookup154.fun/kd_tripathi_pharmacology_book_in_hindihzqd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kabuzore.atwebpages.com/jagiw.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/24720841497.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/cyrano_de_bergerac_1950_cast.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_db711c8356154ad68f53b33644cb6dac.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_7e5cf92cd3234f1cbbd17cafd3586e6f.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_dab1a752f6514b3c9b138235a06e9529.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xipavir/17684940412.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_20a4bc485ac949f095af1022bda3f739.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_1ce0fb9734a24bdf8e8f39b66cebc648.pdf?index=trueIn PDF document text
    • http://vunonam.atwebpages.com/advanced_candlestick_analysis.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_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 4900 bytes
SHA-256: 5c0638c417c53470556e17c2739f05c81a103b7f59b5eda03543db5344ccc7fd
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 11068 bytes
SHA-256: 68cbe85023b19c21e0234bd600267f13f79d747ce857384c7cfa614304ce1392

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