Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3fcb5c33a19446…

MALICIOUS

PDF

64.1 KB Created: 2020-11-22 22:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605847e50a919806aec83ca968ce54b7 SHA-1: 6a097ff2fc1036a186dd039005286fa46d81f3e8 SHA-256: 1e3fcb5c33a19446cfa59c19935a5756e2546f97c8661353f245e174219ad176
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a large number of external links, with one prominent URL being traffking.ru. This suggests a link farm or redirection tactic. While no explicit script was found, the PDF structure and the presence of external links are indicative of phishing or malicious redirection attempts, often delivered via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=formato+de+adopci%25C3%25B3n+para+perros+pdf
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/889e0e9ecbd.pdf
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f87e1b18e501.pdf
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/8babee5bdc.pdf
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f8b3ada367c0.pdf
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/4064779974fde6.pdf
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/4336807.pdf
    • https://wesifepanegu.weebly.com/uploads/1/3/4/3/134337407/d76a0993fec5f3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pegebunov/mccqe_part_2_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/702d6e3d-8523-492d-989a-1d0fcd9d3899/ladaxokokeperonajapaza.pdf
    • https://s3.amazonaws.com/jivala/manual_bilge_pump_removable_handle.pdf
    • https://s3.amazonaws.com/fuwawibu/41499368765.pdf
    • https://s3.amazonaws.com/baxegezivumi/23450830375.pdf
    • https://uploads.strikinglycdn.com/files/f3156d20-47a6-488a-806c-cf14da407d8c/51057103826.pdf
    • https://s3.amazonaws.com/susopuzupure/13061722856.pdf
    • https://s3.amazonaws.com/wilugugo/konsep_biaya_dan_sistem_akuntansi_biaya.pdf
    • https://uploads.strikinglycdn.com/files/a7fcadea-4a8d-42ea-a509-a076c196be26/96610830912.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_off0000bd92.bin
4b69f7b8a2155f942cb915df9aa0d24ac15ddfb6cc440f04356b5aacaa5f3e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD92 5360 bytes
font_01_sfnt_off0000cf79.bin
4ff1fc42e093b27289d5f79398baca08b29d234fa6f639debdfde73e70686a9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF79 10424 bytes