Malicious PDF — malware analysis report

Static analysis result for SHA-256 f343d7b5bfbc94d0…

MALICIOUS

PDF

72.4 KB Created: 2021-03-09 00:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6047d94472779797a94c1bb3d782f1db SHA-1: 1fb130c41f5d963614e197e84e99572d6b78b06a SHA-256: f343d7b5bfbc94d01d3be0c3aec614b87e15561c45108b4cf385a821679f35d7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing. The primary malicious URL, 'https://botokaw.ru/award?keyword=hebrew+bible+pdf+english+download', is presented as a search result, likely to deceive users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://botokaw.ru/award?keyword=hebrew+bible+pdf+english+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445116/normal_6002bc9197c0d.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/WMiihf6/2622340253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477173/normal_5ff3394395d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5ff9ca5605cc2.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/hQaazij/retokid.pdfIn PDF document text
    • http://waliwijufe.iblogger.org/rulomitejamak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_602056da967f0.pdfIn PDF document text
    • https://cdn.sqhk.co/zevijevam/Ggix1ih/free_3d_model_rock_low_poly.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/banula/water_and_fire_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/96418972790.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_0092ff33d3554b06b9d5d1efe08b02d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/plugin_ocr_wondershare_editor_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/83930231017.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/jolokogepizugokunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/72329835566.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_f85c2e18e3bb4076b25a6500f7e7e12b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/69201939452.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/learn_eyelash_extensions_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/wezujadubob.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/acer_chromebook_15_cb3-532_price_in_pakistan.pdfIn PDF document text
    • http://bivoxubi.epizy.com/47796578041.pdfIn PDF document text
    • http://kedokonox.rf.gd/fudizovumobe.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_off0000dc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC81 5496 bytes
SHA-256: 21da09d08648e14aab7f157bfc4aabb84b47107ce3d81e1063bbef4c36e1c0b1
font_01_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 10812 bytes
SHA-256: 5d5e6fbe64668ef9618d4435b6041349fa8a03474959dc61698a5751d8cd31ec

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