Malicious PDF — malware analysis report

Static analysis result for SHA-256 067e9999df5e0afc…

MALICIOUS

PDF

76.5 KB Created: 2021-03-28 20:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011f9f610760972a9f358c3ce9af42b7 SHA-1: 72f19c4a0ccbaa06a0986d235a3242e665fad763 SHA-256: 067e9999df5e0afc2c76fc02b4992acfaa671486f8c6db9640ae018622a1d037
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm or phishing attacks. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to home warranty and HVAC replacement, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://vilenefex.ru/strik?utm_term=will+a+home+warranty+cover+hvac+replacement
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/93ed5.pdf
    • http://gisoboxizaza.mygamesonline.org/data_structures_and_algorithm_analysis_in_java_3rd_edition.pdf
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/6596626.pdf
    • https://veximukexapi.weebly.com/uploads/1/3/0/9/130969798/54162ab81.pdf
    • https://cdn-cms.f-static.net/uploads/4410004/normal_60311d99942d8.pdf
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/jivezefivom.pdf
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/587351.pdf
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/nizovosojolus_fatuginexubexub.pdf
    • http://nogurufegu.mygamesonline.org/thank_you_mr._falker_by_patricia_polacco.pdf
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/9140326.pdf
    • https://cdn-cms.f-static.net/uploads/4373753/normal_6012ce2cc56e3.pdf
    • https://cdn-cms.f-static.net/uploads/4478414/normal_6058df74bbb23.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://supajiwa.myartsonline.com/jokaxabeto.pdf
    • https://s3.amazonaws.com/wewuxuviwar/tipiperotumesowonemedo.pdf
    • https://s3.amazonaws.com/gajabedafot/pelpro_pp60_pellet_stove_parts.pdf
    • https://s3.amazonaws.com/kukazowox/will_cyberpunk_2077_on_ps4_be_fixed.pdf
    • https://s3.amazonaws.com/satulibaren/photoshop_template_for_facebook_cover_photo.pdf
    • http://tuninedup.epizy.com/figo_guidelines_placenta_accreta.pdf
    • http://bevowamudad.epizy.com/gdpr_policy_template_for_care_homes.pdf
    • http://jatomije.rf.gd/fotedonosokukezumufixeru.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_off0000eb64.bin
83db975a5b82702824b0f8878e83f23d266e3dddf9d709a2f6ee4fa8db0a705f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 5264 bytes
font_01_sfnt_off0000fd41.bin
2f308cafcb1794441ce3aa92dd64668ade4cb707afd22174a04fcdfbfaaff39d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 11028 bytes

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