Malicious PDF — malware analysis report

Static analysis result for SHA-256 d224c1d671948ac6…

MALICIOUS

PDF

66.8 KB Created: 2020-11-21 05:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 960ac87ec99a78ba156dc402a7ccc660 SHA-1: acbaa6387d2cf2f5cafab653b59ffa7d1434009a SHA-256: d224c1d671948ac69c8d0fe2a8807abe6c8c2e1004ab0d5bc5d9545697415ed0
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/wb?keyword=android%20studio%20connect%20device%20mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5f9e0c2869c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5fb88ca52a5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_5fac25f4297de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fa623d6b2a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f920352b534d.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/e34eeaf1-21f8-4be4-ad53-691c22563ec3/45467992295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5d2b46-5d30-44dd-a7cf-8b7ca6907b1c/bewafa_se_wafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93459f96-8ff9-48f6-874a-51e8ca2bc7ec/pur_rf-9999_replacement_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6514d9fa-18ed-41ed-9b3c-ba7e9ad46437/alcatel_a463bg_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22687d6-bc6b-45d4-bbb7-f027809d4a9b/89135034094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31bd8f6c-0aa6-4223-be7e-d09d3a1985ac/nazixoralewomusonesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd214b8-a7ab-4237-836f-062054f4a487/kumevuluguzarij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00ceba1-c6f6-49c7-a40f-4947649ad898/exercicios_sobre_crase_7_ano_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a4efbc-b239-4082-99c7-bf542a4c27de/70539413711.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/62859283780.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_off0000ca57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 5100 bytes
SHA-256: 012ddee8aa4d2ea1f8ec6c5858723761d4b321589f9881c56e252341063d8d13
font_01_sfnt_off0000dba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA1 10224 bytes
SHA-256: 37df3831aa305fb64a1bf211e2662896474e1cfa9ca9c9aa418f68e57d21e37b

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