Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17879a93afe00bb…

MALICIOUS

PDF

82.4 KB Created: 2021-02-26 22:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3030fea529ef3db11c974ce3e3cdb322 SHA-1: 5464ca108e549bb59e8294791abf2059a0adb5ab SHA-256: b17879a93afe00bb29f8b09b3e15f7f14af01e563406f5b2cef250a2aa9a571e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into fraudulent financial transactions. The primary URL identified is likely part of this scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://golowaki.ru/wix?keyword=athens+or+sparta+worksheet
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/kizosewuwebiwe.pdf
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/8fc10.pdf
    • http://jusapp.club/nox_emulator_for_macand43.pdf
    • https://tozirodewekopax.weebly.com/uploads/1/3/1/4/131453541/0d6cc9bb550d562.pdf
    • https://cdn.sqhk.co/fatidizeru/ibjcsje/20933800613.pdf
    • http://nowatora.22web.org/hungry_shark_world_apk_uptodown.pdf
    • https://xoxumowuna.weebly.com/uploads/1/3/5/9/135964844/lodasalubata_mudejuromasas_fixozatov.pdf
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/xamorowexopo.pdf
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/8245407.pdf
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/9669f31b.pdf
    • https://cdn.sqhk.co/ridijafugemi/JhjgFij/1386014800.pdf
    • http://topcabinets.xyz/99970670913mbky5.pdf
    • http://fakaripeti.xyz/application_form_for_phil_passport_renewal9txi2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jutenojamega/vegeku.pdf
    • http://satonavuka.rf.gd/90_day_plan_presentation_for_interview_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105db.bin
f311a9bd2d9ca8c18001fe14d50d1ab834e41dbfda2dfa8af591ca1f9da11298
pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 5020 bytes
font_01_sfnt_off000116f5.bin
d2f643252ea45e5b0291fe5fea9a8c20301818c0c7570f18f2cf4136db6e0744
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F5 11416 bytes