Malicious PDF — malware analysis report

Static analysis result for SHA-256 befb8a0f0b36d98f…

MALICIOUS

PDF

75.7 KB Created: 2021-01-14 12:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 33624ddd295d29da82de01f4599feace SHA-1: 975941ba20aeca49354e32770f8019655714d95a SHA-256: befb8a0f0b36d98f1ebd7f34fe43c8ed455c402afb276fbe497fa2e6470d8402
154 Risk Score

Malware Insights

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

The PDF file contains a lure related to "Top 10 shooting games for android 2018" and embeds multiple URLs, one of which is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?utm_term=top+10+shooting+games+for+android+2018 In PDF document text
    • https://cdn.sqhk.co/lugizumevemu/q1jihiZ/7286773863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_5fb937ea8229c.pdfIn PDF document text
    • https://cdn.sqhk.co/wituwuxevef/ihZptOd/find_my_phone_apple_icloud.pdfIn PDF document text
    • https://cdn.sqhk.co/dijobika/ZPifagj/girls_frontline_2_release.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f9f266fee5fb.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/YadidbU/buvoxesonutudetavi.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/hehc5if/dark_souls_bonfire_3d_print.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fa679f827d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_5fb7da93d91f1.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/7phii2D/cross_the_road_game_frog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_5fabe609b7091.pdfIn PDF document text
    • https://cdn.sqhk.co/gobikazifelo/fibuja8/7008553710.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/ejgggge/venus_fly_trap_plant_michaels.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 5892 bytes
SHA-256: f08b5c1c589c6a64a4d81f662dde71d627802fe04badde0576a658306b8f9148
font_01_sfnt_off0000ff03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 10240 bytes
SHA-256: 06735709efe332718349272901359c948c9bb081ab10e15f1aa19c368116ccfb

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