Malicious PDF — malware analysis report

Static analysis result for SHA-256 2582dc493f6415fd…

MALICIOUS

PDF

75.0 KB Created: 2021-07-16 15:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73a5237ee3b376beb6ae491b0cb67ea0 SHA-1: c18b3f5bbda3f02677c55db53e6427134d95cb6f SHA-256: 2582dc493f6415fd36ad9abcfdf9d1be575310528e0b36c32b363abd347c4a54
96 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs suggests an attempt to lure the user to malicious content. The file's structure and detection as a trojan indicate it likely exploits a vulnerability to execute a payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/jEScUJLm1bs/square?utm_term=how+to+write+logarithmic+equations+in+exponential+form
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f129cc6e3a8560b3d2bfab/1626417612724/sacraments_in_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf2e1d6ef6771c1de1d28/1626206945303/veal_milanese_with_spaghetti.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f121142c92ee1dddddb21a/1626415380972/motivational_words_that_start_with_s.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0aa84eb563320f92f0285/1626385028393/jevukozibewova.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5dfbfd66ff3739f0752d/1626234364203/hbr_10_must_reads_on_innovation.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede7778443ee2c8930fb6a/1626204023432/nupovumuxoz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e960c4db8bb141badb0eac/1625907396934/fiwodizul.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_off0000c150.bin
da5c08b500113d52f51f15a9c6fb9e2b4bf270cecee57d996cd2c08f453ed89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 16784 bytes
font_01_sfnt_off0000ed27.bin
62ccd6823dacb49f6fb7486c9ed292c9b9534e72cd19e8751d5884f49824db17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 11352 bytes
font_02_sfnt_off0001076d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 16792 bytes

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