Malicious PDF — malware analysis report

Static analysis result for SHA-256 529d32f859c85386…

MALICIOUS

PDF

66.6 KB Created: 2020-12-23 07:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b55c999aef447139690a92d147173a4 SHA-1: b80902ab450e987828970b0c9e3461e0a92aa665 SHA-256: 529d32f859c85386abecfa61e3efbec041ac13568c8b69142b5b733b1ded3744
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, with one identified as a malicious redirector. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or initiate downloads. No scripts were extracted, but the PDF structure and linked URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=brick+breaker+revolution+2+java+game In PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/801d689.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/sinerepobuwaxupisa.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/fezenur/45018254453.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/60575914161.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/playstation_emulator_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/biomedical_informatics_industry_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5f54c8-9dc8-4d4f-acad-84dd235222f2/16814257136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012f5f4d-13fe-42e5-a004-b9c286357ec9/15867216833.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/amazing_pictures_of_nature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3537766-f4f4-4d8b-ac1c-be16e107b871/tusonuposazonumivaleti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d024a87939686421378a/t/5fca1dfa2e4d7f67ca327421/1607081469230/44221021919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c94773-a6f3-4851-91e6-b324dd7637e4/86580445971.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_off0000c211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC211 5460 bytes
SHA-256: 102b2d2193434b2f6251f51a7b9e6cb98a438f4e2a3056fb78c409e5676d9384
font_01_sfnt_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 11484 bytes
SHA-256: b09aea149af6cf4aefe3ca90d3ff73d27a9c7765157d6478e6f97f7a18fd438c

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