Malicious PDF — malware analysis report

Static analysis result for SHA-256 abda634101645afc…

MALICIOUS

PDF

86.7 KB Created: 2021-07-19 18:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f049bebab788d473adc8383feffca41 SHA-1: d6b8729358b76734a16c790b745a5705535bd75b SHA-256: abda634101645afc632b581c08a8734554a3277cef62d490d93f022e888ec2f6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8615

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/ZV5PD9BTPXI/square?utm_term=ought+to+have+meaning
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8bcf03add050c1b4a817a/1625865456408/92475705657.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecca15c38c70342faf57e5/1626130965250/dragon_coloring_pages_hard.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7acf54a52c186ce40907/1626110671569/hospitality_meaning_in_punjabi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60effec1d052060b21f6d3e3/1626341057578/bamonumotexevazofab.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecaa881996685841ac6c5d/1626122888851/wegawapovadowowog.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e907dc025aa46e30d1b8e4/1625884636666/marriage_alliance_meaning.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9517e563c1506a8b79de7/1625903486552/states_and_capitals_list.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_off0000f4fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 16792 bytes
font_01_sfnt_off00010d0d.bin
186f86db76124d1d73037f233531161a08e1e4dc1b09d366ff276d534fe9a84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0D 16372 bytes
font_02_sfnt_off0001379f.bin
e5771d9c38a934de51fae96dbe0169a0c501c5d6f97114f60621ebcbb4ab5a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1379F 10432 bytes

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