Malicious PDF — malware analysis report

Static analysis result for SHA-256 13104d3582b574b1…

MALICIOUS

PDF

90.3 KB Created: 2021-03-09 01:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ec35b45a8235289096e35b635c70d3 SHA-1: 708df68a8372ac680f629125d5deb5dba1d28fdd SHA-256: 13104d3582b574b16894c696ae579dbee11bd1d59985a8e416698417405d34f2
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL indicate a phishing attempt disguised as fitness information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://resalured.ru/strik?utm_term=how+to+build+big+biceps+without+weights
    • https://cdn.sqhk.co/jetirivotu/jcghfgh/last_day_on_earth_survival_tips_ios.pdf
    • https://cdn.sqhk.co/wepigosogo/TighhZX/live_nation_tickets_phone_number.pdf
    • http://sowoxapexemex.sportsontheweb.net/breville_bes870xl.pdf
    • http://tufuwavaziga.mygamesonline.org/66906025821.pdf
    • https://cdn.sqhk.co/gotakavapu/4lOLibG/rojigonukagexazudupuli.pdf
    • http://goloturasituj.66ghz.com/24389639498.pdf
    • http://kawolamekepe.22web.org/vuxele.pdf
    • http://xaxifibipebux.iblogger.org/puwemigiferunu.pdf
    • http://jidapuxedepu.medianewsonline.com/72687791341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_b16608c92c764438aa403e7db62781a7.pdf?index=true
    • http://fitimulosegi.epizy.com/tipos_de_bombas_hidraulicas_automotrices.pdf
    • http://vilepobafomunow.atwebpages.com/43313968899.pdf
    • http://legokejapo.atwebpages.com/swear_words_in_arabic_to_english.pdf
    • https://s3.amazonaws.com/dewazewokib/fishing_report_washington_canyon.pdf
    • https://s3.amazonaws.com/rizezobabub/guxidanoduwelutepibovixan.pdf
    • https://s3.amazonaws.com/bewibiwat/kekusu.pdf
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_2e3d79a48ec74cd49e64192a9acc1158.pdf?index=true
    • https://s3.amazonaws.com/safago/infographic_video_template_free.pdf
    • https://s3.amazonaws.com/sojaxub/14177779030.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c36.bin
4c7b62728a14eb942321503fbea517861126205aac54957aad43683f6f703910
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C36 5220 bytes
font_01_sfnt_off00012e00.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 1800 bytes
font_02_sfnt_off0001368e.bin
99dc679fbbf8c9340bf4983d7b3edcef77dcba56dd712b7d2f3c7941bfd49932
pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 10756 bytes