Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6182e0f6281738a…

MALICIOUS

PDF

80.3 KB Created: 2021-02-19 07:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9e7adda7313dbb78e3f0533411a9fda0 SHA-1: eb10dfd9fb724db509c51996106cf22e666d5e14 SHA-256: f6182e0f6281738ad8e97ae9457a3c2816ae5b0291257cef0b172f383572d9f7
184 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, and contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for an 'LG dual inverter AC manual'. The embedded URLs point to disposable hosting and are likely used to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=lg+dual+inverter+ac+manual In PDF document text
    • http://big-ita.space/vevugikwyvt3.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/d6QhfJy/jubisitanazepapojolofolar.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hgjaiei/widosorepotokafiwukowoz.pdfIn PDF document text
    • http://hamlikjorettoop.ru/titan_quest_anniversary_edition_cheats2g95c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcd4447cd985.pdfIn PDF document text
    • http://blaugrana.ru/csgo_buy_anywheree46ad.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/bM2pWii/holley_super_sniper_efi_turbo.pdfIn PDF document text
    • http://kinoxca.xyz/xibenosojipipps856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fd721467b379.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/Tl6Lohc/motatovebekevadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_602d389f4584b.pdfIn PDF document text
    • https://cdn.sqhk.co/mixasuwekov/hjghoUo/word_cookies_special_level_red_velvet.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/Ggfhigi/81781160601.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/cjboE9U/fiwelejobatugigepefif.pdfIn PDF document text
    • http://igafnd.org/natural_background_hd_wallpaper_freeciq6b.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/72ZPBjA/golden_dragon_chinese_takeaway.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 3064 bytes
SHA-256: f2bc8a76a1d8f597684ed9620dee364d25c9d163021a0107bddf9590e6920615
font_01_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 5084 bytes
SHA-256: 644c6772ee3794366966bdf496ad9002b390618507d104f6f6ac5912c54afbab
font_02_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 15972 bytes
SHA-256: d31f6cba310bd498618d8d5ec46b8d216205ba14295c3ed8246e5bec2000bbe1

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