Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b38fcd4a9ae530…

MALICIOUS

PDF

303.5 KB Created: 2021-03-14 21:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 74d427a79da54eea6d8194cc22995a11 SHA-1: 8ea018e650bf1119ab84e3d65c85f6329cab8d1a SHA-256: 64b38fcd4a9ae53028160b2cf5b69d2fe5f270c811bfd2341186b81b7c85361f
176 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically designed to redirect users to external sites under the guise of a free download. The ML classifier strongly supports this, and ClamAV also detected it as a phishing trojan. The embedded URL and numerous other URLs extracted from the document all point to malicious or suspicious domains, likely serving as part of the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://seumenha.ru/wix?keyword=the+devil+and+miss+prym+2009+pdf PDF link annotation
    • http://esplus.pro/891895985551r6gm.pdfIn PDF document text
    • http://probkin34.xyz/where_to_donate_winter_coats_near_metu9gw.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/nkghvSm/gold_stack_rings_australia.pdfIn PDF document text
    • http://getbuiss.online/frigidaire_gallery_model_fghb2866pfnacjss2.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/manual_de_organizacion_y_procedimientos_hospitalarios.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/f5ienhj/dozitobub.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/mr_crack_habibie.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/camscanner_online.pdfIn PDF document text
    • http://alfa-quest.ru/tifilelimoj7wj.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/xetudidukiwop.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/xuzogaxofitolubimeju.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/32865182188.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/pasutejubixusekuzijagaliw.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/pjdZ5tk/mimpi_gigi_copot_atas_belakang.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/clasificacin_de_cuentas_deudoras_y_acreedoras.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/gdjgghT/37974824971.pdfIn PDF document text
    • http://grenkasalo4.xyz/nautical_life_latest_mod_apk_2._123xf9l8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07eca3a0-6658-4c79-9768-edd01ff4020e/73097314106.pdfIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_e9aad1adef314e8a8c6657834c1face6.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_f1bcfd1d982b4d7ba259902c317849e1.pdf?index=trueIn PDF document text
    • http://nukilaba.myartsonline.com/v_shred_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c029651-3c10-4d17-a96d-0507e6ddf836/vepivunixu.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_b89d111016424e3088d503c7929c185b.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_0dca737e110e4743b5072741c7f6d51a.pdf?index=trueIn 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_off0004759b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4759B 5824 bytes
SHA-256: 081fa7e2016293c4339161c78c00ab2d58ac6c9673e1ba836a1e7a937ecea79b
font_01_sfnt_off00048949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48949 11316 bytes
SHA-256: 2e789b9b9b18c418b07895e9b1f30a067847af98bae67a8122e6f1b4643992fe