Malicious PDF — malware analysis report

Static analysis result for SHA-256 0454b41aa2b2338d…

MALICIOUS

PDF

74.0 KB Created: 2021-01-06 15:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1157eb16cd5b8c41b8a62cfc23cb9ff9 SHA-1: 3fde5b19e7c81911f1a68dd302bcf4bc83b98609 SHA-256: 0454b41aa2b2338d6532641432f77889611fca0645867983337b26c314259b74
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a PDF link farm. One of the embedded URLs, 'https://traffine.ru/wb?keyword=pop%20ball%20bubble%20tea%20where%20to%20buy', is flagged as a known malicious redirector. While no scripts were extracted, the presence of malicious links and the link farm characteristic strongly suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/wb?keyword=pop%20ball%20bubble%20tea%20where%20to%20buy In PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/a171b38a69a1.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/6895391.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/eEiaibg/rabajixifadolibiwujofis.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/bjz8Ljj/gotip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1086a6d-3dc6-43f4-99f0-f5afc73314c5/64342257158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7b6d20-1ceb-4a40-a625-2de5716d91b8/roadrunner_email_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d78779-fd8a-4051-bed2-b9306620c472/hustle_castle_hack_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5808e80e-d421-4cfc-bb5c-9a16a9af6c1c/85881706611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c2a10d-6cbf-4725-b618-1bac2b5cc985/fuzafineza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0171b105-5fff-4211-abd8-c9446d39c6ef/hco3_bicarbonate_lewis_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf27a18-ec94-472e-b1a8-73a9e28da50b/number_the_stars_movie_sean_astin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75226b9-701f-45b1-ae0e-f010587e4b2b/65938428230.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC703 7824 bytes
SHA-256: 8715f443ba37e6e3e5a414b92cf8d0e7269e2c75ccee2dee46dc8d9f09a9b5ef
font_01_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 5064 bytes
SHA-256: 7916bd99b4d35ced443cb5b7e81cd5987d0bac159d61012f1705e3091078781d
font_02_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 12028 bytes
SHA-256: 26409be696507d9811f770594431cdea4df34aab7b4a54d25cca0d275b522f2e

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