Malicious PDF — malware analysis report

Static analysis result for SHA-256 87755f3e4f99e9bc…

MALICIOUS

PDF

77.0 KB Created: 2021-03-06 06:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 69bf7f704caa44eadbf19b881db3bc64 SHA-1: 32ea074c2294818391451b8e605ad8bbec61f2a3 SHA-256: 87755f3e4f99e9bc6952095df2109d8d89657656663429a3371028b3bc7c5d9e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://jottigo.ru/wix?keyword=essay+about+myself+for+nursing PDF link annotation
    • http://fitnesspack.net/craftsman_shop_vacuum_filter_178167zcg2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_603bf5c3f316a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_601a16067ee42.pdfIn PDF document text
    • http://findssldz.xyz/aragon_les_yeux_d_elsa5v2p7.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/jiguwuzobozobaz/zagoneniboloxi.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/vugazikukunasorim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41531970-c705-4118-a839-b2afe1bf2ecf/66275155887.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/towujizedisamit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a373447-f99f-4b55-97ee-39d6da473d68/top_20_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86301ca9-f143-409f-8646-893f1983ee29/wolf_oven_cleaning_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd3e95f-5700-4349-956a-49ae72036a7d/17892910700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713b075d-48ce-4d7c-8ab0-e5082e4a38b7/original_skyrc_imax_b6_60w_mini_professional_balance_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca46780-e78a-4d4c-bd9e-cbd8f7862f7a/madonna_sex_book_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6069d871-3d84-4d47-a81e-eae902ffab91/circuit_of_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f3e931-e43e-453a-b693-67c2a23c2eb4/lemaxugu.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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 5284 bytes
SHA-256: f38f973f8bdaf0a414a30c22d512dbf2f3dea49b3ca0a533a5b7580288f604a2
font_01_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 10644 bytes
SHA-256: 6570db9e168f5dde76cb5e1bca450f3338dcaf6810b64e14220a4bb9be1973d0