Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58aa2649244d5fb…

MALICIOUS

PDF

222.5 KB Created: 2020-12-30 05:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b45cd7813137a6ed880092a595111b00 SHA-1: be26438eea386c81d26c8f2d37628b6c8500aa3b SHA-256: d58aa2649244d5fbceb4e5fdb08463381bc30f4397bde0a2416da8fc96a5c4b6
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and an embedded URL pointing to a suspicious domain. Heuristics indicate it's a phishing attempt, and ClamAV detection confirms it as malicious. The ML classifier also flagged it with high confidence. The embedded URL is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=messi+free+kick+goals+champions+league
    • https://cdn.sqhk.co/xasakeza/ifjcjcr/inclusive_environment_early_years.pdf
    • https://cdn.sqhk.co/xasakeza/YmVibig/wars_of_ottoman_empire.pdf
    • https://cdn.sqhk.co/sovokeduseb/jh5hjie/nodewezisupatunepip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f416ec6-c3a5-48f9-93db-e1331fee583a/lonuj.pdf
    • https://s3.amazonaws.com/pazifetanegapu/93478416379.pdf
    • https://uploads.strikinglycdn.com/files/88c922ae-da11-4403-b056-88fe723d9589/fotusodanowituzurano.pdf
    • https://uploads.strikinglycdn.com/files/c6749cb1-21fe-48dd-9ea7-4db71bc3e567/54221258963.pdf
    • https://uploads.strikinglycdn.com/files/e0238846-e6a8-4d33-b23c-326a4b0e20dc/obi_wan_kenobi_memes.pdf
    • https://s3.amazonaws.com/wilugugo/jadual_caruman_kwsp_2017.pdf
    • https://s3.amazonaws.com/viromibukoleliw/ausformulierter_lebenslauf_beginn.pdf
    • https://uploads.strikinglycdn.com/files/68382f65-5788-4837-afea-e7c892d319d7/black_damask_wallpaper.pdf
    • https://uploads.strikinglycdn.com/files/d97177cc-f973-4c1f-b9ed-b15d042ad54b/mardens_store_brewer_maine.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_off00032bcf.bin
39a7bc07a87c0f17ae9aacdb7af667e9976807a3a905b0d598d10f551a2df962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BCF 5496 bytes
font_01_sfnt_off00033e6d.bin
058c709d179e0e39d200e69685e016bd61e5f24901e9cf58de0220a21d7ad785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33E6D 15120 bytes

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