Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0131b04bcd4c16b…

MALICIOUS

PDF

82.0 KB Created: 2021-07-14 09:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71f718b901dc950f35db5c5e9e4cf43b SHA-1: 600ac219b1c979c139177a8bbb58e94ad7405e27 SHA-256: f0131b04bcd4c16ba5b15349ebb465c7616bc8b2eddb78c8a8dffb50671340f0
96 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall detection profile points to a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/um1bUVUAM38/square?utm_term=sedentary+lifestyle+definition
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eddd4ba9d1f62037e29678/1626201419602/memorize_in_swahili.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca4435f8bf9690720f8de/1626121283268/dovisesem.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee14561cf0e6777f2b4829/1626215511027/notice_to_not_renew_lease_from_landlord.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee07dead58ca03d22b3f2a/1626212318272/33273435903.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ede7363e011143712935e1/1626203958660/sufomo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed42c0c76d6b0ba00bc584/1626161857064/21275188092.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda2838d40d36f00846d39/1626186371389/yugioh_tag_force_3_rom_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec965e9cb57f380a793fbb/1626117726502/18634822932.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edccd8ad58ca03d224d668/1626197208992/55125848177.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee83cb9c71001bedf9aef1/1626244043509/zukatisunagajukiperuziwe.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee80fb0b33b63bb8c9d5e7/1626243323433/joniguvulewijegubekefonu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee5bedeed6cd77ab63d012/1626233837970/what_4_things_do_plants_need.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee6eeef72ce0266e12c368/1626238702836/fiduciary_trust_limited.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_off0000df59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 16792 bytes
font_01_sfnt_off0000f76b.bin
42e13992ba8da277a0ea001d9941bb0fe2a1610daba8836f41d3791f06a990ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 16892 bytes
font_02_sfnt_off0001238f.bin
c5e0b4649b1f4d8b0fcbe300f6045102829ac6251ea4c08f861c88d504f45eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 10536 bytes

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