Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef71f8d3e441e3c…

MALICIOUS

PDF

71.8 KB Created: 2021-02-17 22:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fbf771c89bb15ae68950fac30095bdc1 SHA-1: 6f987a40fe5be82544b442774070394bcd696b92 SHA-256: 8ef71f8d3e441e3c4f49a4ec6b9a724edcb92ca6a04f04e4c3ae4a78de687d33
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=what+can+i+plant+now+in+central+florida PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/SZjhnie/hot_wheels_driftsta_2019.pdfIn PDF document text
    • http://kdghy.online/70329900328n7ber.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fc5857015df6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fef6ad21c76d.pdfIn PDF document text
    • http://robinmani.site/liens_de_parent_entre_les_tres_vivants3gbrv.pdfIn PDF document text
    • http://wijebibot.iblogger.org/aadat_ninja_song_video_hdyaar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_6008cb2a84706.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/fokapikow/mathematics_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/pose_season_2_episode_9.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/88565768731.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/nefikedej.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/36329095520.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/vuwek.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/fax_cover_sheet_example_filled_out.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/11230833524.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/naxemupigujumebosodug.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_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 5168 bytes
SHA-256: d8781a1fcd839600847d9efbc158b7835ba64b768dfdce301546972c0dc9e0fe
font_01_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10600 bytes
SHA-256: da562c9918982b93b2e7467d48fee6ac114824c20ac4f4c619e3f70ca33ef0d8

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