Malicious PDF — malware analysis report

Static analysis result for SHA-256 07defbe4c2deaf5e…

MALICIOUS

PDF

94.2 KB Created: 2021-07-17 15:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5619c686fc24ccdcaa3c178c962703d8 SHA-1: 71d9395537a1bd9da193a8c0c6eb777f4c9b5ba8 SHA-256: 07defbe4c2deaf5e1f47cd937cb5e2fbe52863c955f26e3c26ba2e0653e9d002
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that points to a URL, which is likely used to redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs suggest an attempt to trick the user into visiting a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/~3/4Ji06Fp1PxY/square?utm_term=highly+significant+p+value
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7868d96f3e33e8a18ffb7/1625785997766/77113374748.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee89036d75c50a5d47f17a/1626245379150/dictionary_of_etymology.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f10119e7c782239586d129/1626407194063/gudijadoxotuzegazuginas.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f22bfc1db272198f8ada3e/1626483708217/emc_networker_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0854c3c320e2adc377d1d/1626375500827/another_word_for_catalog.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0577505f87640ba7d8d0e/1626363765691/sex_and_world_peace.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f260bade9f7d6ab7b2131a/1626497210483/tortuous_aorta_meaning_in_tagalog.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8c51cd7702a4b9a6f592a/1625867548135/jipuxunukupakomen.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecef6df95b5524f94d5ab6/1626140526152/10697445549.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e86a8742a7165951da240f/1625844359923/an_anion_exchange_resin_linked_to_cellulose_backbone_is.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6f7877e2cd4113f2df23/1626238840560/essay_on_the_longest_journey_i_have_ever_made.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f576.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 16312 bytes
font_01_sfnt_off00010b81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 16792 bytes
font_02_sfnt_off00012393.bin
341ca00394762c94696646eb9a9c4ad69ec16965a7a84ce85f865d83d9f35b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12393 18104 bytes
font_03_sfnt_off0001539c.bin
f1ffe5ef7980150d9f32f5e7bb5e7f7a7bd8cbcc4a4882d376abccc40147d359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1539C 10812 bytes

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