Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46a94ba184a337f…

MALICIOUS

PDF

79.0 KB Created: 2021-03-04 12:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9dee37e1d3d8b23a28b487ec879a3068 SHA-1: 53add92016efd38bc57de439d6a89090a59df27d SHA-256: b46a94ba184a337fcc9b11d61ef133a225be677dd1a5734908fd5faf54911fff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a PDF link farm, with one prominent link pointing to 'baarspo.ru'. This heuristic, combined with ML and ClamAV detections, strongly suggests a malicious intent to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=wide+sargasso+sea+full+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fc69586d87cc.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/9kTjfja/ceramic_art_tile_shop_crewe.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/dovilamoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_602d2457976d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fd958ff1b961.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/YihMqmk/dr_reversi_review.pdfIn PDF document text
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/86970.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/d2r8ZuH/crush_ball_smash_color_stacking.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fc5a645accf9.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/pepaxaxof.pdfIn PDF document text
    • https://cdn.sqhk.co/wixedineve/jaQUgjk/brain_dots_nivel_214.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/harry_potter_book_series_illustrated.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5ff5191636c4f.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/wuxupewu/zebra_zt410_settings_not_saving.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/fishing_report_for_lake_cumberland.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/2305099511.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/nice_anxiety_treatment_guidelines.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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 5292 bytes
SHA-256: b158f3dd43e8b0af2384dfc3e63b868c6416bf448ca92d4a58a2ae726345688d
font_01_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 10212 bytes
SHA-256: 19d84e6496f654de8a5342ce1164de1801b208a562916c7cae98d52668101d68

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