Malicious PDF — malware analysis report

Static analysis result for SHA-256 955fa1daea8afb5d…

MALICIOUS

PDF

84.1 KB Created: 2021-07-16 04:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7d8f7dc41286efa9c21a3dad82375e65 SHA-1: bb3cc8b6b17d55ba28c39ed6ccbfb777f0ecf560 SHA-256: 955fa1daea8afb5d8dd3d54e1a99e7398f8d552d6bc52386fc0ec9dbfda852cf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs and obfuscated content, typical of phishing lures or attempts to download further malicious payloads. No scripts were extracted, but the presence of external URLs suggests a potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

Heuristics 4

  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=medical+diagnosis+for+shortness+of+breath PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e84d483ad3040a268b0171/1625836872776/90111038589.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0437ce9d3bc610301342f/1626358652931/related_rates_implicit_differentiation.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a4b5269fa62ee09e5e9b/1626383541383/tipepu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0bf2b74384d54fdf7d4bb/1626390316261/mother_in_law_birthday_quotes_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7e90128bb5f4f51640591/1625811201988/mix_chihuahua_yorkshire_terrier.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 16516 bytes
SHA-256: 90c9ceb6e3a211e2eb1f6d523e3fb2fed9796107b729cef1f1f288a008212396
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 10888 bytes
SHA-256: d635b1a4a8fa9709f9c59a9ff0b8b7cc82e422c54eebf998c61aee22b7ba2c8b

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