Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dcc3e0ccf7144a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-27 19:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5aef8a912b3c3fe5f0a0033aba8c85c SHA-1: 3a32173780dc556189b11ca02414bd59a98db7c8 SHA-256: 58dcc3e0ccf7144af39a2c2c5733b52ec205fea9344120f94d8ed74b60aa1fcc
216 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a ClamAV signature, specifically 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. It contains an embedded URL leading to a site that appears to offer a malicious 'root phone apk download', suggesting a phishing or malware distribution attempt. The presence of a link farm and the 'Password-protected archive handoff' heuristic further indicate malicious intent, likely to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://lozipotod.ru/wix?keyword=root+phone+apk+download
    • http://bravos-kids.ru/what_is_the_use_of_web_servicesgfxa2.pdf
    • https://cdn-cms.f-static.net/uploads/4419001/normal_6014937742220.pdf
    • http://revodegasiger.sportsontheweb.net/38926214716.pdf
    • http://premial.su/arduino_ide_windows_10_driverhu9hy.pdf
    • https://bobiguwifuza.weebly.com/uploads/1/3/5/9/135966914/zaduzeno_darereko.pdf
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fe75a7fccf53.pdf
    • https://cdn-cms.f-static.net/uploads/4426263/normal_6029f84bd9387.pdf
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/fejolonujavomus.pdf
    • http://heymama.store/teoria_del_entrenamiento_deportivo_pzirm1.pdf
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/vominaduwed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/minaxigevani/biochrom_30_amino_acid_analyzer_manual.pdf
    • https://s3.amazonaws.com/fakuguvil/gym_body_photo_maker_app.pdf
    • https://s3.amazonaws.com/pazatuv/zavojunaratofetupiruse.pdf
    • https://s3.amazonaws.com/nagudo/bliski_wschd_informacje.pdf
    • https://s3.amazonaws.com/muvemasoxaji/ziresajanogapivujepadip.pdf
    • http://pekafujojef.onlinewebshop.net/50251498247.pdf
    • http://koduwutuvage.onlinewebshop.net/28891815679.pdf
    • https://s3.amazonaws.com/dusubonifu/tapizomizokaguvusejomafug.pdf
    • https://s3.amazonaws.com/pilazi/sumafigolaxagebibimasivo.pdf
    • https://s3.amazonaws.com/vavabi/frederick_douglass_worksheet.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_off0000fca0.bin
e148d9dbf074e8ea38bdf618d3ba9425456ff6d747b2094e281a3a008a894ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 4936 bytes
font_01_sfnt_off00010d7f.bin
c3487f7fdaebef3c35e84934c9b4001af37703e6b4f021c7ebb6f97c0dcc74c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 10956 bytes

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