Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d7686cf4611551…

MALICIOUS

PDF

76.9 KB Created: 2021-07-16 03:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfaaa545c27a70344e3a88af8a06f782 SHA-1: 722e3fc65f99129cfb3e6264fef4fe59b1f6abb6 SHA-256: 84d7686cf46115511a1d19adb0029dee968f36f2539e8561878ceead63d739be
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL, which is a common tactic for obfuscating malicious links. While no scripts were directly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/razvivatel/yapz/~3/NsX9ihectO0/square?utm_term=assassin%27s+creed+ezio+collection+controls+ps4
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7e6bcc97682122423074/1626111596106/words_with_a_short_u_sound.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7faac217102653d5d19d/1626111914851/gemonubafowam.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8427cc9768212242ccf6/1626113063772/boy_scout_leadership_positions.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed438843ec04194fd60883/1626162056874/64154170635.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0651ae1e5f345c8df40ee/1626367258641/45794253132.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0b7dda57b467a2289f3ec/1626388446144/folivesoditipitopefuz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2f498c96c6301f91cb5b/1626156873872/how_to_play_crazy_craft_on_xbox.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e798df4aaab0286a870e93/1625790688533/37150138685.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f046dffc6647025a3b618b/1626359519186/geography_as_a_spatial_science.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edabbd9a9df7051d40b1a8/1626188734047/sisebujizok.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7c54d23621b4743e307bf/1625802061356/just_love_me_just_love_me_i_wanna_be_with_you.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee1fa1796bb0196c5f872f/1626218401836/joxavikubutubegafinimu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee52a6115d504d3a87cbd8/1626231462286/89594601395.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_off0000c5f0.bin
01accbf771e4ad2e9b83fd612d21a23b2401824ec3e6b3ec7621f62c5fe7dc79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F0 18016 bytes
font_01_sfnt_off0000f49d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 16792 bytes
font_02_sfnt_off00010cb4.bin
410d5d41ab0399dcf249a65d3960396dd627ace7212469756d448769d73308e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 10660 bytes

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