Malicious PDF — malware analysis report

Static analysis result for SHA-256 538d9a318c3c66e1…

MALICIOUS

PDF

237.9 KB Created: 2021-02-21 21:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 200fe9d67dfdbc8df731aeea362660a6 SHA-1: 7c001f0000ad1c507f52137e992742ea3dfacc69 SHA-256: 538d9a318c3c66e1f599745fae4662011acdc107fcc890c719b2a535f5544e36
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to a search query, suggesting a lure to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://seumenha.ru/aws?utm_term=what+is+the+literal+translation+of+the+word+islam PDF link annotation
    • http://alcozerox.com/78172566609bn20k.pdfIn PDF document text
    • http://citimart.online/wow_classic_mining_guide_ironktjbm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408981/normal_5fcb696980597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_6019d656bf79d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc62e3ee1c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390074/normal_6004c6219981e.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/gLcggja/16997476574.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473892/normal_5ff2ab2643d77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_600fe78cb36a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dujepav/answer_king_crossword_quiz_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/52274458495.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/math_fractions_worksheets_test.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/ciao_adios_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/jarikopomulozoxadeninu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0003732c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3732C 22772 bytes
SHA-256: d1b6b68812d345e5d433eeb98a9b3d95a2c18cfe55a91eb190cc1dfe67522ce4
font_00_sfnt_off000337dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337DC 5040 bytes
SHA-256: eec84da1c917f264d1464b22bb29e0e4f3ba2c699c1004214dee8021da9d088e
font_01_sfnt_off000348dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348DC 13172 bytes
SHA-256: ca472bcba7116fe14bcd6cba307ef0be9be952ebc84e93a7914b50afe1317e3d
font_03_sfnt_off00039ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39AC2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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