Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60eb0e9d45bc59e…

MALICIOUS

PDF

81.8 KB Created: 2021-04-26 00:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 409b1862af0fd874857cd92632c1fee1 SHA-1: 1fd658df6272163fa9985ee624af4b385024d83d SHA-256: b60eb0e9d45bc59e9bf166bf8281eab3141d18bf0bfc51bae6fc373fa13f3133
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically highlighted as a potential download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=god+is+disappointed+in+you+download
    • http://pugisapi.mypressonline.com/is_the_sun_a_medium_star.pdf
    • http://getcreditreport.info/netgear_prosafe_16-port_gigabit_ethernet_switch_gs116y42ue.pdf
    • http://dukepiweg.iblogger.org/learn_english_online_free_course_with_certificate.pdf
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5fdd7a7adc331.pdf
    • http://davupopebuwiser.sportsontheweb.net/rsistance_aux_aminosides.pdf
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/9046403.pdf
    • http://jobware.pro/how_much_is_a_john_deere_d_worthkwo91.pdf
    • http://gemofesane.medianewsonline.com/mojixosub.pdf
    • http://form-lnstagramcopyrightservices.com/36568405213aacr7.pdf
    • https://linugezi.weebly.com/uploads/1/3/4/2/134265501/9393984.pdf
    • http://kopalirigel.mypressonline.com/attestation_de_prsence_employeur.pdf
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/gegigarizutus.pdf
    • http://digovin.getenjoyment.net/79957368483.pdf
    • https://static.s123-cdn-static.com/uploads/4369183/normal_5ffffd78c897b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fozugafunu.epizy.com/fiketalupapisatozomadurid.pdf
    • http://wotidupodugi.myartsonline.com/ansiedad_libros.pdf
    • http://desujiruvomeb.myartsonline.com/alcanfor_propiedades.pdf
    • http://xelaful.epizy.com/86740060114.pdf
    • http://varosuvavim.epizy.com/kuriwosopusifota.pdf
    • http://podozedomusajor.epizy.com/niv_dramatized_audio_bible_free.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_off000102e4.bin
9ef0b37d9ab0dd016e5a1dd5b883105dfb608c44bc5c54d299bc2bc7c54696c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 5080 bytes
font_01_sfnt_off0001145e.bin
ad92515bd9d3cf64827386acdb09a4603eea7eee657ac6e8dc13922e0d7d13c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 11048 bytes

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