Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c6721deb9bb649…

MALICIOUS

PDF

71.4 KB Created: 2021-02-20 17:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 55ae62fe87c73943e6ee3067b736af87 SHA-1: 46984ed8ce8946921c73083690d2b0796527bd43 SHA-256: c3c6721deb9bb64924628c4741c246a85fded0e280c3232ddb435daa0e06d571
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The document body, though heavily obfuscated, appears to be a lure for users to click on these links. The presence of multiple malicious links and the ML classifier's high confidence score indicate a phishing or redirection attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=best+positive+mindset+quotes In PDF document text
    • http://tersq.fun/53740292459og6m.pdfIn PDF document text
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/zivejemozafa-fefusof-wamitirexob.pdfIn PDF document text
    • https://cdn.sqhk.co/nunewole/bidRcnu/badufibofuzawaxidom.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/jdhaVii/vogefenebufowesetufuxo.pdfIn PDF document text
    • http://electriccannoz.club/play_baldi_s_basics_online_no2vrqq.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/hdhejiX/mr_bullet_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/3gjjj2E/turinimebu.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/fukezavazuj/dujuxonufusugofol.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/23681482347.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/new_hair_cutting_style_image.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/cardiff_sixth_form_college_entrance_test.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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 5004 bytes
SHA-256: b6b299ef486f98dbf9707c97aae1e7c1e77196dd7cb05c379f2a2b661967bddc
font_01_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 10984 bytes
SHA-256: 049983e95735656b08031e58961c23597db6ef0c4121c01f420a21b556c906a3

Open this report in the interactive analyzer, or submit your own file for analysis.