Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd01a47ac4064066…

MALICIOUS

PDF

88.9 KB Created: 2021-03-14 13:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3797efa0dc5887e96fe34a99369b98e5 SHA-1: 1828dedbd566af6fdc9c0175b989392d954cadd7 SHA-256: bd01a47ac4064066dc96bac5c222a6dbcaf4ac16bfe33a4d4573bd20598c049a
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 0.9998

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://jottigo.ru/award?keyword=butler+university+campus+map+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ff135671426d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_6011f0f87f570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fc5f78562f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_603d5222bd72a.pdfIn PDF document text
    • http://vebejisidag.66ghz.com/oracle_bpm_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_6049e63fe933c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9f2997-40f6-4987-824a-b3dff16ac850/what_are_good_trivia_questions.pdfIn PDF document text
    • http://lidizuderezoza.rf.gd/50592200093.pdfIn PDF document text
    • http://bolesumedinix.rf.gd/cultivo_de_arroz_en_terrazas_china.pdfIn PDF document text
    • http://sexusig.rf.gd/95019122152.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_4bfb486a46f74085ac6624a380f8b11f.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_b73c7a8406f34297bd1c342b7b797da4.pdf?index=trueIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_6b64f52cde744475a6438bed58d6a77c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99860d24-ddc5-4f0c-830f-82efdab5d149/how_to_buy_bitcoin_on_cash_app_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620358dc-f733-41a4-b355-d032d60533a4/lakshmi_ashtottara_lyrics_in_hindi.pdfIn PDF document text
    • http://mexowotevofo.rf.gd/jupipi.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_41b161e20f4a4d70a00b7a6b7895a907.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_59807a2b76f64abcabb8addea140f863.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_d66cca013a484fd98d47728f63ea57c3.pdf?index=trueIn PDF document text
    • http://galojuxutiwas.epizy.com/los_10_pergaminos_del_vendedor_ms_grande_del_mundo.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_off00011d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D37 5512 bytes
SHA-256: cc78982884e833ec6abf4c1722550af3e4efd69877c099352ca9f8208b7aea90
font_01_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 11076 bytes
SHA-256: 24ee98603b78e96498580386d68e6a3922fad400b4e56e965a533375070b89d6

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