Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8036ecd30ce014a…

MALICIOUS

PDF

75.2 KB Created: 2021-07-21 12:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2505b111dbdfae7b2aa8f51c494c5f4 SHA-1: 44070f8e4be5d9bc72d08695a6d0b4a0f7398a4e SHA-256: d8036ecd30ce014a65c05543cce4af09ee84e334ba993ca06767a411fb6cda24
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple security heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile suggest it is designed to lure users into a malicious phishing or malware download scenario. The file's metadata indicates it was generated by wkhtmltopdf, a tool often abused for creating malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/RVI1sXQGPkU/square?utm_term=how+to+craft+elytra+minecraft
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f224ba503a216717852b74/1626481850808/life_support_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f34ff94f27972c6040a357/1626558457502/rexutaduza.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f30b2c783e880aac7bef46/1626540844887/element_in_group_5_period_6.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_off0000c55f.bin
5571abfc1ea050e40bcfbb062bab3bf6ab858c8bf381c8b031d860dc223c48fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC55F 10520 bytes
font_01_sfnt_off0000dd57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 16792 bytes
font_02_sfnt_off0000f569.bin
cad8c2a7d7a6bd78d1083f374343ddd1dad204b5e9cbffc660fd0e7f1debf60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 16764 bytes

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