Malicious PDF — malware analysis report

Static analysis result for SHA-256 812f45aab82ba644…

MALICIOUS

PDF

81.6 KB Created: 2021-07-16 00:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60fd3b94a7bba098e70fbab474e8f44d SHA-1: 7ef916b436019390bcb164f505112ceca015c88c SHA-256: 812f45aab82ba64478ca39803d7eac5ac9c7786ca8f484dc4a28a80788cf0bc3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs suggests a phishing attempt or a lure to a malicious site. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to exploit vulnerabilities or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=humans+are+born+evil+quotes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec91f5bcf8be39b506746c/1626116597650/sepezufadafa.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee40bd537273346e2fd38b/1626226878038/rovilov.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e91749dc37083541b863db/1625888585982/vevitavorawa.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0675262e978296c9c451c/1626367826524/70696767068.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b1cb7be683581ce07e61/1625797067129/vizadutevax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f002301c2a3138378e5ef8/1626341936711/the_second_conditional.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a2f85d0204096d9d6c7d/1626383096780/self_introduction_in_french_with_english_translation.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee37460981f36585a1aa0f/1626224455073/thank_you_for_appreciating_me.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee58647426fb5109f67512/1626232932983/situpezovavovelepeba.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e929408fb24157da705c13/1625893184933/helmholtz_watson_character_analysis.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e879e774000c7cf29effbb/1625848295345/how_to_play_multiplayer_on_black_ops_3_xbox_360_offline.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_off0000e06b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 16792 bytes
font_01_sfnt_off0000f87d.bin
1a33dc62186a2a4fc428a71d1f67cf15f784821a95b21c6a27fd8cc1be3dc384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 16032 bytes
font_02_sfnt_off000121b3.bin
ce9cf50e21ee302b8bd3e6be3257908ba10206d38a6a48b39e043079ba5c3677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 10712 bytes

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