Malicious PDF — malware analysis report

Static analysis result for SHA-256 95730d70752c1f13…

MALICIOUS

PDF

67.2 KB Created: 2021-03-09 12:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67236648047d5d8bc6f96833db542fa9 SHA-1: 929806c73f491c34191fe8bfc9bb239ed0bd4e6c SHA-256: 95730d70752c1f1342b134299a7e8136aad25363fc0ad8839e808e4ab63945e2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=g+shock+3230+battery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410954/normal_5fc77634dfe16.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/jcGZhdQ/mizifoxewajaj.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/gesujabewa-bifaziwito-bupadefamadeje.pdfIn PDF document text
    • https://zabugejagovim.weebly.com/uploads/1/3/1/6/131637755/9927094.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/Q3jiOTN/can_we_apply_paint_on_sunmica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_6023d6d185d79.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/bkidiek/24616591407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_60162a086586b.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/ziahgwD/lerufemopajune.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/pujiveximed.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/bokexizometun/forukukidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b68caa2-395c-4549-adde-96bb0e41eba5/19705060418.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/33916077737.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/ableton_live_reference_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/mcgraw_hill_ryerson_biology_11_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79edc3ac-826a-4915-adbc-349128fb18d1/megidekam.pdfIn PDF document text
    • http://toronakurimub.epizy.com/94274379976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fdf723-4a2a-4ed5-922a-407f5dc4d315/22849361672.pdfIn PDF document text
    • http://xowupetakesa.rf.gd/fuvevezilolaganaxafus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fbf8f45-c466-4406-9644-221b9f8403a7/zisatabagedabeposaw.pdfIn PDF document text
    • http://kewuzelaxapog.rf.gd/16163614066.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_off0000c644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC644 5628 bytes
SHA-256: 71b762bca4963abdc0aa6b9ff78ad3f224683817f82e96f994975787719780f1
font_01_sfnt_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 10812 bytes
SHA-256: d9209a0c96ca8d513f65417ab6d4bca64208ca43bd4f56a336a9c497bb72f0be