Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1206dbf2b94b37…

MALICIOUS

PDF

78.7 KB Created: 2021-06-06 08:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1290b33f5b965a61d50e1c55751e232d SHA-1: a952a3f515e0049dde74f6224a96445d9f34b579 SHA-256: eb1206dbf2b94b37e5b72b58a5938c6639b49480f8b0aca82bceed074c284100
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated and appears to be a lure, possibly related to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/pbw?utm_term=lactic+acid+and+alcoholic+fermentation+equation PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d2e02b-c60d-482c-9159-af5bf367e9be/is_microsoft_flight_simulator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79fdc6e-7e97-4100-bc7b-b2937fc389f4/s10_4x4_v8_conversion_oil_pan.pdfIn PDF document text
    • http://zixereves.pbworks.com/f/pigegulare.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/electric_circuit_analysis_question_papers_vtu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9732292e-738e-4c9b-9d50-58d95d889306/dezibubexejegugim.pdfIn PDF document text
    • http://varulemenel.pbworks.com/f/livro_aristteles_e_dante_descobrem_os_segredos_do_universo.pdfIn PDF document text
    • http://xetuduju.pbworks.com/w/file/fetch/144674586/16760308285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397bd37a-571b-45f9-ab16-ce4988c09689/fexur.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/proto_germanic_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07c4113-034c-4c52-ba3b-7533a3a84802/plt_marker_size_scatter.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/rajakeraguzapuxiwili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a78037d-0aa7-4ef1-ad8d-ff0f02c5fe0d/josaxi.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/xojosibaluxirabatutesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a625e54c-565f-49ad-af86-a98468631d8b/husky_20_gallon_air_compressor_150_psi.pdfIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144456018/how_to_reset_2012_honda_odyssey_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f524aeb-6e18-4be3-afd5-b41d7794f77c/fofovanulopotun.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/f/lorne_armstrong_tcap_chatlog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56156294-3c0c-4dde-a622-e08e26cceb46/un_mundo_feliz_sinopsis_corta.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/w/file/fetch/144671055/vijolokefitisiloniwewomaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a31d2f-e557-4067-90cb-de7c9d106965/4_p_of_social_marketing_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fbe488-a0ac-47cc-8281-ef2fc6732369/zanunula.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_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 5148 bytes
SHA-256: 15001357bac2f567607797f2b2e0dc388943bb31eb5478655685d41d79c39304
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 11004 bytes
SHA-256: 7c5c6784ea2914fdec19bcde40345fcf681c860b843c16aad4bc019d86e4809c

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