Malicious PDF — malware analysis report

Static analysis result for SHA-256 e089b352de1eaa44…

MALICIOUS

PDF

80.1 KB Created: 2021-06-04 20:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94bdcd0fba7a03fa080c93ca34160215 SHA-1: de4bc55813eda2a2f4dedab9f59986383d24b4e9 SHA-256: e089b352de1eaa440aacce5abf15e6f46c32ecbc13e90ce39b07a8ec60cda38f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, flagged as a link farm, and a visual download button, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=intro+templates+after+effects+cs6+free
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/gikafu_sekuzadixoz_rufufinaduw.pdf
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/4482845.pdf
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/melitibajanup-ditob.pdf
    • https://lukajupuxeburi.weebly.com/uploads/1/3/4/6/134630189/349fef0549.pdf
    • https://delaludesepomaz.weebly.com/uploads/1/3/4/0/134096679/bupoze.pdf
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/sirotadado.pdf
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/80eef6b97ae.pdf
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/melixaj-tasejamazot-nukimumaxe.pdf
    • https://texosubos.weebly.com/uploads/1/3/4/7/134715033/gefikoz.pdf
    • https://kezozebajex.weebly.com/uploads/1/3/4/2/134265808/780193.pdf
    • https://fopizute.weebly.com/uploads/1/3/4/3/134315067/6213a2910862e.pdf
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/ravejeralafuxis-golosukenun-sibesexexovaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/819f9890-58b3-45bd-9a9e-066a8af989a0/zeluxujuritof.pdf
    • https://uploads.strikinglycdn.com/files/7d203712-7424-40ce-a2c8-bdbde6ceeac1/mavirugowo.pdf
    • https://uploads.strikinglycdn.com/files/edcf5b30-fdca-4ea9-861e-22cbf4044d80/how_to_use_the_niv_study_bible.pdf
    • http://mapaduzipi.pbworks.com/f/17078063657.pdf
    • http://fogofalo.pbworks.com/w/file/fetch/144547413/wotemepemepotexev.pdf
    • https://uploads.strikinglycdn.com/files/c6f29563-a510-4a3b-abe3-5798592cbd3b/what_is_comprehensive_test_of_nonverbal_intelligence.pdf
    • http://lokiboz.pbworks.com/w/file/fetch/144442179/kabir_singh_instrumental_ringtone_download_zedge.pdf
    • https://uploads.strikinglycdn.com/files/aec23b0f-9d54-4fe6-a6c4-0ae5636ef924/what_are_types_of_authors_craft.pdf
    • https://uploads.strikinglycdn.com/files/59d07957-dd97-40f5-9d05-4f8503bc4173/timinuworevavuxudusu.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_off0000fcb5.bin
46f48c2f0dcc4bd20691f1adc5435310a6e80be9c7a4522bad7f3c28b59d8709		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 5252 bytes
font_01_sfnt_off00010e77.bin
0db8ce1a558e74239df04838b287572623407de05f37ed91dc48e13c952a8dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 10572 bytes

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