Malicious PDF — malware analysis report

Static analysis result for SHA-256 c847e3be130d197a…

MALICIOUS

PDF

78.0 KB Created: 2021-03-28 19:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 620cdcbf2360569e5ba7dd47fd7265a2 SHA-1: 9e50106957da459bd45c395261fc9dce43f59297 SHA-256: c847e3be130d197a5c5ca112217a8eb7c788a5f98ba33f63846a42dbdc766da9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://mezovuduw.ru/strik?utm_term=how+do+you+clean+and+oil+a+grandfather+clock PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/secret_of_the_ages_robert_collier.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_create_custom_register_page_in_wordpress.pdfIn PDF document text
    • http://wuvozikeximufuk.iblogger.org/92103437087.pdfIn PDF document text
    • http://gusitolife.iblogger.org/what_are_the_three_tools_of_monetary_policy_what_does_each_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/izaf4Mu/mp3_ringtones_free_download_devotional.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/90958057158.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/73176014849.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/Cjaje8A/cyber_knights_rpg_elite_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/kgiggpW/bounce_ball_apk_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/reference_sheet_baseball.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/fruits_and_vegetables_worksheets.pdfIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_44539a049b1b4d86945759c8ea28a44f.pdf?index=trueIn PDF document text
    • http://xuvifovagorinuj.rf.gd/correlative_conjunctions_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/mobile_tester_interview_questions_and_answers.pdfIn PDF document text
    • http://ribigilubawedom.rf.gd/fishing_report_utah_rivers.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/o_que_significa_direitos_e_deveres.pdfIn PDF document text
    • http://jufofokisib.epizy.com/deripurojuwujunozomul.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/41561377773.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/botononofu.pdfIn PDF document text
    • https://0b902d11-d057-4dfc-bffd-bcb57e9ba729.filesusr.com/ugd/696b8a_845a1316c6f74ba7af622a2b3660d83c.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_15f770aadd384cbbad73b77c8b68cf22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumasun/farafazizisisosanudobezoz.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_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5324 bytes
SHA-256: 2d3fcf6e3adc5a330526f244ab8fe3f0d629282aa8838c2e407dc68a31066d52
font_01_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 11232 bytes
SHA-256: ee1889943ae6385bb3b78266f58fc977a4cc3dbf86c72ec32f57a8b500218d84

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