Malicious PDF — malware analysis report

Static analysis result for SHA-256 27718b66c4e6b889…

MALICIOUS

PDF

82.8 KB Created: 2021-07-21 18:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7da4d9fa84b90edbf6bbbe1ee0d14035 SHA-1: 5ca94e530619ac920d69485c68e7adaf518b619f SHA-256: 27718b66c4e6b8898803068ce04fc79049e082c7ac9340c56fd13760348cedcc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/-MXWpcYQ7kA/square?utm_term=deviance+from+social+norms
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4da6bb85ab7f02be01c7/1626230182849/gnats_in_hair.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8799bdd82073f6ff7f9a/1626113945140/4_state_of_consciousness.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5c0f9ed1ae6238ed8f079/1626718457517/xifuwamurudesovuvebig.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4a1e5bb7e64222d06cfab/1626644965971/33556151862.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e76c577cf3bc63ca22aa16/1625779287975/gingival_hypertrophy_causes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86c321b1ea3752714a25c/1625844786629/nerve_gliding_exercises_for_thoracic_outlet_syndrome.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5c2722086e54bc4a80601/1626718834175/maguzi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec85a8a3e9df788e6d9de4/1626113448954/xeloruza.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f4d392c0fa6a1644f01678/1626657682259/92900368761.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efccf8c00d13116b4235fc/1626328312387/wozuminesomokenovezur.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2441e699a8678c570268a/1626489886293/she_say_do_you_love_me_i_say_only_partly.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3d9c5668793736d36f73a/1626593733915/zenitewiderebi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f01df816a6d35a111429d7/1626349048904/vatinegul.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda89a5e50ea0df8e135c9/1626187930407/emergency_homeopathic_treatment.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee64bb9b1e4d6a360fabaf/1626236091892/18226174337.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3d071699a8678c5804de8/1626591346018/winutiwubidu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93457defa333328ab1700/1625896023421/another_word_for_strong_women.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f6616cdbd168652f2ed3c2/1626759532506/94986983111.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1be5c5861144f85c18f3c/1626455644367/28646799207.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee8ef2f72ce0266e1405ef/1626246898505/virofokom.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_off0000e30e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 16792 bytes
font_01_sfnt_off0000fb25.bin
602fcb062f0128a02ab40722c7fd9f04c238e4ac847b5ab49306458226c29022		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB25 10464 bytes
font_02_sfnt_off000112e4.bin
da5b4292c8a2e7899b94ad847bc6208b7f571398b211a750ead85fdd92298e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 16284 bytes

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