Malicious PDF — malware analysis report

Static analysis result for SHA-256 594e0fa2833736dc…

MALICIOUS

PDF

74.7 KB Created: 2021-05-13 22:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2faac3a07dc35cf6d4c33a4faec32052 SHA-1: b5da5851e9b0cd3324b0a09c87a5f38fc8759d4b SHA-256: 594e0fa2833736dc77ddc66d2c7f3fb11f23da4b947e5d03c8997ec585bead59
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the external links. No scripts were extracted, but the PDF structure and URL analysis point to a malicious document designed to lead users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=addition+and+subtraction+of+fractions+with+unlike+denominators+word+problems+worksheets PDF link annotation
    • https://cdn.sqhk.co/xobupiba/bNhdid7/pikakokavesis.pdfIn PDF document text
    • https://kifirazet.weebly.com/uploads/1/3/4/7/134715796/3b92c3.pdfIn PDF document text
    • http://kusufuxufatup.getenjoyment.net/pdf_agama_islam_kelas_10_k13.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/i0ErFB9/food_wars_season_2_netflix_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/jege45T/25023004084.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/21fcfce685.pdfIn PDF document text
    • http://magazinrf.xyz/364604718065j3da.pdfIn PDF document text
    • http://gonzo-3d.com/96140549061p9mn5.pdfIn PDF document text
    • https://bevamiwe.weebly.com/uploads/1/3/0/7/130739198/daluwekovi_xemezob_sogubinetipo_tadukejumefakum.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/goxalusakebigukipo.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/xidomokutekerogurikifi.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/0d3eef65-b5f8-477c-a82a-963982614a92/matematica_financiera_formula_interes_compuesto.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/long_division_worksheets_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bd4c52-585f-4c0c-8d02-70d5850ee08f/historia_natural_de_la_enfermedad_diabetes_tipo_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa42e03-6025-4ebd-b832-ce5e01e49abd/41343969532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02cf805-53a6-4c90-93a8-f86fe4faf8f5/22781796538.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/16575702829.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/vajezi.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_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 5680 bytes
SHA-256: 8dc484cffe5bd02b4f674d1a7667e7d966e4851b78025da7c2d308f302bb6f1a
font_01_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 11956 bytes
SHA-256: 6a09f3bd04300de379c9aac4c673f020264341a8ffa53588decb8afe85da376a

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