Malicious PDF — malware analysis report

Static analysis result for SHA-256 873e86c05fe3ef2a…

MALICIOUS

PDF

73.1 KB Created: 2021-01-18 09:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 11106da0c60d7c91e27656b80d4941c4 SHA-1: 2531c8129b503a81002dec7a1dd2bface45f5cb1 SHA-256: 873e86c05fe3ef2afcc0a651fcb7f13cae4df9e7a85e858bb908df713d74939e
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and a ClamAV detection indicating it is a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://traffnew.ru/wb?keyword=changing%20face%20mask%20on%20riddell%20speedflex PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fa318bb6bda3.pdfIn PDF document text
    • https://site-1191564.mozfiles.com/files/1191564/rupemabaso.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jz2jeuH/ualberta_eclass_support.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/9xhfaic/tepizilomenonuze.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/gfGiagi/16993640594.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/iijjRwQ/free_to_use_indoor_basketball_courts_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/Gigvoif/kabukamaxironeporolipit.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/0WYjfuY/the_sims_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/Q4W4Jif/milamexupudese.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/Vieqwia/bamuvuxanowebererutixeko.pdfIn PDF document text
    • https://site-1249763.mozfiles.com/files/1249763/plague_inc_evolved_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/fzhjjfW/wifipanonujavelomusasaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxotatizomeno.rf.gd/rirajibejelesenatiji.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_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 5608 bytes
SHA-256: 5c6cde59dc113e969eeba746ed3cf47f1d2e0cad40eab4aab62558a076f8f898
font_01_sfnt_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 10600 bytes
SHA-256: fa86f55063d1043671091e45f73bea65059d49fb83e11be104d564a9545cefd1