Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d570adc28753064…

MALICIOUS

PDF

67.5 KB Created: 2020-12-09 21:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0e011f14d074816b70ca8e61db1da19 SHA-1: ec6bd2541b150e2f09aa81f54ff661f678c31216 SHA-256: 7d570adc287530643a4972f02186b6badd3896abde4449bb1fd196f902927593
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to a 'fishing report'.

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://trafffi.ru/aws?utm_term=carkeek+park+fishing+report
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f96c4a9e5829.pdf
    • https://xumusiroti.weebly.com/uploads/1/3/4/3/134321309/607295a05c5df.pdf
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f907ad81fc7d.pdf
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/7296729.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc366d6ab79f442f239893b/t/5fcfc12d8432343bf75cd336/1607450928436/paper_io_4j_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/e7bd1452-192d-4c3f-8bb0-f4db08761dcf/one_last_time_ariana_grande_lyrics_english.pdf
    • https://static1.squarespace.com/static/5fc5444e8787e8798988a94a/t/5fcc2dac5177ea328cb3608b/1607216557104/wewukorezigepexami.pdf
    • https://uploads.strikinglycdn.com/files/39e13ea4-a974-462c-9f75-55ecd3b10a97/popus.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/boombayah_korean_song.pdf
    • https://uploads.strikinglycdn.com/files/b4ea2349-6cef-4598-806f-13870af65b79/236288198.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab4.bin
9a45df4be88ee3cf1a99f28ed776d59c898208883e2ba03bb8fc52e35f5fc7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB4 5100 bytes
font_01_sfnt_off0000dc0e.bin
68adb01998681c4ac84f996b1184dff7d7c81774d415c00a4c9cf6c5911f3051		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 11064 bytes

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