Malicious PDF — malware analysis report

Static analysis result for SHA-256 343e745afdedf006…

MALICIOUS

PDF

75.6 KB Created: 2020-11-20 12:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bd5dd92c0a76059f7683ff9c45fe9bc3 SHA-1: 65192a6edcc3a2197cd37529ea2ae558982dedae SHA-256: 343e745afdedf00609b8b947bfa03c9146362d1763869cb633c26aba13675ae4
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/wb?keyword=bridgewater%20principles%20pdf In PDF document text
    • https://sofivowipaduru.weebly.com/uploads/1/3/4/4/134454637/5642407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472506/normal_5fb47c5ddb5bc.pdfIn PDF document text
    • https://kotugelofamoxu.weebly.com/uploads/1/3/4/4/134403640/9457984.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/sogatava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8b757c4b2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5f9c186beb362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f98aa8dc37bb.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/972e0327-9391-4347-86d3-fad9447240b6/18677082591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c56602-7a76-4c5d-93c8-7308f30015c4/kog_maw_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1608590d-dcce-4131-9a2d-3810f6ccdd06/gemegitowiwitozedugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544f1820-5fbd-4879-9720-7bab78774dbe/44334849519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55089beb-4deb-410f-878f-d909f7abe7ea/11226144313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457a89d8-d888-4b32-847a-076aaa302a10/stardew_valley_quality_sprinkler_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c17686-8e64-4be2-8888-59eea34be43b/92488556169.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_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5464 bytes
SHA-256: fdb34f8a556946d21e650d9d46a570d1a8f17574be8c614a587451b64d4617c6
font_01_sfnt_off0000f9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 11840 bytes
SHA-256: 205846088c06a1391f400f0dc0aa080f128d351426e953c0ea08a075837ba729

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