Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43c20856064367d…

MALICIOUS

PDF

71.7 KB Created: 2021-07-14 10:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fb3bf1a17ee1665a500573488c588ab SHA-1: 96dee5572ad9bde2404250d603f4c8966b2a88df SHA-256: b43c20856064367dd2bbcab30ca4e1c36cbe93915cf2e3ef5bc74e7cfe935e47
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized PDF. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect the user. The PDF_URI heuristic points to an external URI, which could be part of the phishing infrastructure. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7342

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/sq/ugae/~3/CHqDoFjlE84/square?utm_term=sideburns+on+face
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ce6946a8e17713e423bb/1625804393857/download_game_bully_apkpure.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd8643e011143712798da/1626200164978/left_eye_is_twitching_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7757100780223f09d042b/1625781617096/toroduvupovozageki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE47 16792 bytes
font_01_sfnt_off0000d65e.bin
fbf7a8e5b6440865e6546d853996cd1a438516a9aca0cc16aac49a38ba551f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 10640 bytes
font_02_sfnt_off0000eec6.bin
196464e38948f5e0c201f0c8f6f02b2df5664785b131ffc8c89c5aec8c80fc5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC6 14720 bytes

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