Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1704d5ce4f882b…

MALICIOUS

PDF

77.5 KB Created: 2021-02-20 11:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: eeeb83eb88afd65ffe6737c94a569c60 SHA-1: b659ff07077772b8bdc087bba3626e7f844697f2 SHA-256: 3f1704d5ce4f882b5b1d622b6abee70a55bf88a318953d866521afff376f7c3d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=hoover+tempo+widepath+vacuum+cleaner+bags PDF link annotation
    • https://nupinegudoxaxu.weebly.com/uploads/1/3/5/3/135350485/wedimamine_viwaregatedap_guxeb_wadib.pdfIn PDF document text
    • https://mifimixaxenerut.weebly.com/uploads/1/3/3/9/133999571/1177781.pdfIn PDF document text
    • http://ketuzel.22web.org/foundations_digital_post_test_answers_consumer_awareness.pdfIn PDF document text
    • http://kafixerutatad.iblogger.org/28052033956.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/sozet.pdfIn PDF document text
    • http://tizigigukaj.22web.org/vilniaus_autobusu_stotis_informacija_telefonas.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/tinivosefafugag_mukaseb_pijexoz.pdfIn PDF document text
    • http://kadesevi.iblogger.org/91915479191.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/bomifabipi/lowuzoromipegatosijuzi.pdfIn PDF document text
    • http://zitejilid.epizy.com/julop.pdfIn PDF document text
    • http://zofutigo.epizy.com/kemidudaxaxuxelepal.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/liwugedaxalexogonawe.pdfIn PDF document text
    • http://lexojowal.epizy.com/love_failure_songs_telugu_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/microsoft_access_report_sum_calculated_field.pdfIn PDF document text
    • http://kenasaxoxaxober.rf.gd/about_me_template_for_website.pdfIn PDF document text
    • http://bepenaguvofiw.epizy.com/kitemugeso.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/94834984409.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/ampere_charging_meter_apk.pdfIn PDF document text
    • http://marabawem.rf.gd/metformin_er_500_mg_efectos_secundarios.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/community_service_hours_verification_letter_template.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_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 5740 bytes
SHA-256: 0d04e848af94efff64fcb7733868799b04ecb0b3fcf42c50c9095b32fa9d14f8
font_01_sfnt_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 11360 bytes
SHA-256: 761022e8a1befd9968ea9770fad40b7cf8eb6f1d3bf088c864f462dc8afc7a88

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