Malicious PDF — malware analysis report

Static analysis result for SHA-256 3780184693516152…

MALICIOUS

PDF

335.5 KB Created: 2021-03-29 06:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1528a27f938773149f54d7324672d2ff SHA-1: d15b7d2d2e4051e8d3aedda12555df99fae3a835 SHA-256: 3780184693516152c20ffc94c4100bfa6c8e302b7e11fd5cfa67285cf59df583
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The presence of an external URI pointing to 'botokaw.ru' and a heuristic indicating a visual download button lure suggest the document's intent is to trick the user into downloading a payload. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9081

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=cell+form+1+notes
    • http://loveantravel.xyz/what_is_a_moderately_abnormal_molesd14g.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_6031efaa321e6.pdf
    • http://konsalting.info/96197818039gisr9.pdf
    • http://leree4.club/twilight_zone_the_chaser_reviewcb30s.pdf
    • http://pushbiz.fun/luwixemewufibabey9xth.pdf
    • http://titoto.xyz/773130976592x2wl.pdf
    • https://cdn-cms.f-static.net/uploads/4403814/normal_604e16257f6a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufupu/news_report_on_earthquake_in_nepal.pdf
    • https://uploads.strikinglycdn.com/files/24cc4228-7b19-4501-9e1b-58225852df67/26275815449.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/english_speaking_vocabulary_words.pdf
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_af80966b5bb945fd9072e6366c817cbd.pdf?index=true
    • https://s3.amazonaws.com/genijusemu/free_printable_9_times_table_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/a675b413-32c9-46e5-8cd1-965021eb7dc4/35794451058.pdf
    • https://uploads.strikinglycdn.com/files/56fa069e-9bfb-4170-a9b2-3189213fa81c/sowumegotelasuzom.pdf
    • https://s3.amazonaws.com/xapidajovaji/74311260117.pdf
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_0073982bf6af47e3ae2d845343ced668.pdf?index=true
    • https://uploads.strikinglycdn.com/files/833976b7-0e01-49d0-bbb4-87dc6de18806/kupegosubupefopoda.pdf
    • https://uploads.strikinglycdn.com/files/4d2ef82d-fdc7-46c2-aa55-5b968615c6f8/how_to_fast_addition.pdf
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_b79ffcddfa65458cbd11fcee5b79b86a.pdf?index=true
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_f32b28abc2f548c6ae957facff125d02.pdf?index=true
    • 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://scripts.sil.org/OFL
    • 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_off0004dd98.bin
f478b1bf14f29531b8a2854274478f56c4e37f4b5ff3e3b4f00f45bde1631162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD98 4660 bytes
font_01_sfnt_off0004ed66.bin
76adb6de14326fb468167a0ee7519e5e4a108617bf788170681987712422208f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED66 11948 bytes
font_02_sfnt_off00051649.bin
eaf74eefd651e960b44bc59519d73026a4482428d5b1c76449b84fc086f2ee53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51649 16324 bytes

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