Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b8665a7f92bd43…

MALICIOUS

PDF

95.6 KB Created: 2021-04-01 01:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8b33bcd7ccee46a5083733fc68d95091 SHA-1: 22f3ded3c4b6f2d48aaca10cacd4834577341ee8 SHA-256: c0b8665a7f92bd435e7593bd3ac77e9c1ba0e322d87ff9a15cf9586aa32185b1
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically a SE_PAYMENT_REDIRECT_LURE, aiming to trick users into believing there are new banking instructions. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to download or execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=carrom+clash+real+money+apk PDF link annotation
    • https://cdn.sqhk.co/sovokeduseb/MIZW0gc/jizufafasejupene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_60588bdb32083.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/XhgjbcZ/76760728350.pdfIn PDF document text
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/taruvofugatefib_zuwajorimelu_senasepubexebo_migikebijix.pdfIn PDF document text
    • https://cdn.sqhk.co/wajinevisu/fheqghm/34643465766.pdfIn PDF document text
    • https://cdn.sqhk.co/nesixepo/uHOhg16/download_metal_slug_shooting_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jhhgmQd/download_mastercraft_new_crafting_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/cWjiWCk/xatinagodolaxoro.pdfIn PDF document text
    • https://cdn.sqhk.co/futipujorup/hqmRBji/4x4_offroad_parking_simulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/qbgiS3P/straight_rhythm_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_6011c8271465d.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/VOgugdb/96042614286.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/g1jhOHD/rekufojivabuduvu.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/UXBjicU/xakazenazewipivuno.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/nabagenevewo_vevum_nodomejeletipat_kumuzinuzum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_600e67951525b.pdfIn PDF document text
    • https://muluxadi.weebly.com/uploads/1/3/1/4/131453645/ea8a7c4371f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6010416b2f1df.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/jdmjaUD/67878773598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_60216c8931625.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/Svhgjcv/wishlist_online_shopping_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divikufifir/depogujituvix.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/blessed_assurance_piano_arrangement.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/how_to_update_a_garmin_nuvi_200w.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_off00013402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13402 5244 bytes
SHA-256: 0723c2df40d9caea122088c078b3ce38be00ba7a03a988c7a87b732aa2b0b7c4
font_01_sfnt_off000145af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AF 13040 bytes
SHA-256: 818c4fb8ff138a7438401cc8693a10442716eb69df8eba4a307f914b62dd01a3

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