Malicious PDF — malware analysis report

Static analysis result for SHA-256 5643ccd477499b91…

MALICIOUS

PDF

74.4 KB Created: 2021-02-21 17:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f4d2092aad1ef250ce53ef618173da0f SHA-1: a895badbba606d6bc1e5205bc362d171248891af SHA-256: 5643ccd477499b918d4349d8711750f7934c32e3dff2862902fe8fbd0c2f3f02
224 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of an advance-fee scam by luring users with promises of lottery winnings. It contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://yafferge.ru/strik?utm_term=how+to+win+pa+lottery+scratch+off In PDF document text
    • https://cdn.sqhk.co/setinapas/enfshaz/used_armored_military_vehicles_for_sale_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/4jhifji/dream_girlfriend_is_pregnant.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/Xf3hafS/77377277539.pdfIn PDF document text
    • http://help-igcopyright.xyz/65612442374v4g5v.pdfIn PDF document text
    • http://goodsun.fun/frp_bypass_android_8._0_apkwygnz.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/hIjihhV/uae_exchange_rate_today_nepal_rupee.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/dicmNhb/login.pdfIn PDF document text
    • http://logoped-samara.ru/warframe_crossplay_newsgnqdd.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/cjdheyC/virus_wars_best_secondary_weapon.pdfIn PDF document text
    • http://pesale.pro/maine_pyar_kiya_movie_openload5usca.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/janjfij/text_sticker_maker_for_whatsapp_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujipuxi.epizy.com/tata_bluescope_sheet_size.pdfIn PDF document text
    • http://wozaloruwogilo.rf.gd/rumefobime.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/how_to_use_a_selfie_stick_with_iphone_11.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_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5260 bytes
SHA-256: c66bbb8b559e25eb975574f5d2e9c007211b9d9a4e3564fba28d7a198b06bad5
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 10720 bytes
SHA-256: bdee11e7e9a49f752179a0d71c33b3762d7211de3815cfd38212289ae2c1d178

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