Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fce83ef3c3607fb…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 19:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 00f7c7bec15afd0dc629b9838540a313 SHA-1: d40ea5947a7228134e11f9820faa26d1823651a2 SHA-256: 0fce83ef3c3607fbe8a2f4ff245778e5e4b6f0169763a1b333f0375b1b584983
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The document body, though heavily obfuscated, contains keywords related to a dryer, suggesting a lure to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/strik?utm_term=maytag+centennial+dryer+not+heating PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479226/normal_604cd0fe896f3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/jcgh0ii/bubble_spinner_facebook_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_604a4acdb982c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5fce47df9e254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_6010b27bb6728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_60186cc72b36a.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/sjehEii/kick_the_buddy_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/Y0if06N/67235164903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcda5c51b738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_6014fb326c103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5fe086d482296.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/e0b1ad5e-0b92-4bcf-a4e8-1ce5daa36f25/miller_bobcat_225_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/beamng_drive_no_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b38b51-66ca-4a16-a0c5-d0e9932402af/gorilla_mindset_cernovich.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/af_quarterly_1999.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/lagu_arvindo_boru_buha_baju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a418cfd8-c069-4210-91f3-8d6ab9c628ad/pesuta.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/make_the_road_by_walking_vinyl.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/15101758999.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/daily_devotional_guide_for_youth.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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5132 bytes
SHA-256: eed4355ed88a1c53c68dcc1d120571a8632919ae34956d38a5ff199b12f48b7c
font_01_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 9912 bytes
SHA-256: 02bf9be6c6683e6b8eb0f3b8f92e7baf6eb76de74bbe682254454461d98a7bdd

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