Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9a7ebc87b595bb…

MALICIOUS

PDF

74.0 KB Created: 2021-07-17 19:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b94b7ef0181bc1f8f2f4b6549113d37f SHA-1: 491aa2762273f4483a949840c71ce6b6db81ad91 SHA-256: ae9a7ebc87b595bb63929b906fc86f177df58306831e2c04d6424ab00d2ca7c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The embedded URL, while marked as benign in this analysis, is a common tactic for directing users to malicious sites. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7078

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/sq/ugae/~3/cEZ-xJcQpFE/square?utm_term=nice+words+starting+with+r+to+describe+someone
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2ff9e503a2167178d3408/1626537886060/special_letter_o.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91380aa30721e65ee9056/1625887616716/xeplayer_free_fire.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f302fd2be78d526597455e/1626538749508/can_you_train_to_get_a_photographic_memory.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e912d3db8bb141bad8d229/1625887443652/rolasadujijepukibutewi.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_off0000c2ea.bin
61d36e272c304140ad304b24d79cb2120fcf385dd5041f8a55f306680cc10fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EA 14892 bytes
font_01_sfnt_off0000e87e.bin
23327370a2fb40c8b603b7ae38cbed32f9594550790a41e73ecd74f84cb1b77b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 10976 bytes
font_02_sfnt_off000101ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 16792 bytes

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