Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdaa35a68411767…

MALICIOUS

PDF

67.4 KB Created: 2020-11-18 11:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: afcb085083098781ba8171c5e764dcd5 SHA-1: 39aca3a8f88de74c34ffe9fde796e69aaa07fe35 SHA-256: 3bdaa35a68411767dab9c5f30d924bfa5fe26bc161a5f4e6a5c6feb7817d62cf
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=visual+studio+android+emulator+black+screen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_5fb2525f12373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5f96feb830084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f904587d8abd.pdfIn PDF document text
    • https://kabapavubume.weebly.com/uploads/1/3/4/7/134742816/2045852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f89fa654a54a.pdfIn PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/8fadc71225d.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/degerutisig/ungifted_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/outline_paragraph_example_for_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba81799-f72d-4b2d-92c5-70009cf92c7d/fire_tv_settings_apk_sideload.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/zunov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87758fb5-fa88-41f7-ad3e-9cdeb8279bd0/uil_maps_graphs_and_charts_practice_tests.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c52f46-53d3-4b3d-8072-9b7320111b1d/convertir_ml_a_gramos.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/terukodi.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/winikel.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/cd_fernandinho_galileu_deluxe.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_off0000c8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E5 5252 bytes
SHA-256: 9e49cfb0d19a4375d5a07baaa8e684104762a7c2d28c28deecf1d2aa556df818
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 11048 bytes
SHA-256: f40094f15cc1342f4641a4d0b6713084ee66538f390743f8a4935073039efe35

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