Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbdbdaa900fef5d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-05 20:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d70ea40e798549b38f9af9011749d54 SHA-1: 2230692cf3c86357b25041beac9869b23973d441 SHA-256: fcbdbdaa900fef5d8fb937c06efa411bf69a52ef6cdf00fe2359989e626168cd
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'War horse book summary' and authoring application details, suggesting a lure to disguise the malicious intent. The presence of embedded URLs and the phishing detection strongly indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=war+horse+book+summary PDF link annotation
    • https://jelaxatibepa.weebly.com/uploads/1/3/2/6/132681396/wilaxumiv-nabonesavege-pabowex.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/1f7a5fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_5fedfcdff3809.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/boronulovixan.pdfIn PDF document text
    • https://zeruwowigewal.weebly.com/uploads/1/3/0/8/130813736/rasijumemuxuje.pdfIn PDF document text
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/zajivez.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/donupadukedumojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456166/normal_600737ae41bf5.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/vuxobeziguwuduruve.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/manosukiruburekukoj.pdfIn PDF document text
    • https://nosobafib.weebly.com/uploads/1/3/1/4/131438228/4221685.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/84147665061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/febopa/devakudosetetuguluxoxenad.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/87072058415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb280cb-29c1-45cd-8a73-70d6cbb623a9/hunger_games_mockingjay_part_1_full_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/deduzuzivifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470ff093-4572-4634-9c6e-b526a2eef258/vuredamog.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/guarantano_injury_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca07b98-b5e4-4db8-b37e-9dcb43449f12/wemojurafivikusix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918ededa-b4b6-4450-9984-15e91e062095/kenmore_front_load_washer_error_code_f-21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb84929-edd8-4fd8-a1ef-c3f08f8a52eb/christmas_math_puzzles.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5212 bytes
SHA-256: 3fb0cfa7f64d81a88015a31529fe42d5bbfcad8fde1c0c978da925656b84aeba
font_01_sfnt_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 10272 bytes
SHA-256: f1c8340ed837c100f322570ee394548b3ca15048c595d04270b4e3176178b007

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