Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1657903c9883100…

MALICIOUS

PDF

60.7 KB Created: 2020-11-24 21:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2f49fa48c6a067af5260bc339dd69e1e SHA-1: 7552f459dfb2eb647377ec27cb5030371d9f09a1 SHA-256: b1657903c9883100a68ab55513eddb3d7ff518cbe812b3df8b076fa75ac6be23
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/wb?keyword=small%20egg%20shaped%20wind%20instrument%20crossword%20answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fa71432a08ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5fa1e806ca6b4.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/68c5ccfc-d328-4f28-9824-b7fce0f2a0ea/zipije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba84207-7130-411b-a19f-cce6a3fc1d86/primary_vs_secondary_deviance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72134242-aae7-4b1d-9f97-8ab7d3d0494c/new_holland_tc30_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e8ad9a-7d4b-4d68-bfa9-63d091850833/wall_attack_warframe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf132ad-1916-4602-b35a-1a7e6351ee6b/rose_book_of_bible_charts_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/citizenship_quizzes_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d79690c-6c43-4898-84e4-3e083b6126cc/66171016960.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/pavizajirapixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e50441b-4b8c-4488-84be-f20826697f86/wulavawodasomatapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34ed8e7-5df8-4461-861c-22695e5bd1f7/mevagovetipajukoge.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/wujanekazaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1c2c10-1a9c-4ca0-aa24-8cd10effd221/56657869726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904a84a8-a7a9-4882-a3ae-c2dc3916bd56/milford_lake_rentals_kansas.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_off0000affd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFD 5680 bytes
SHA-256: edd4899054770ef3bcd6be52c030f740a04d7f87553a7411a9c234fa60ac6cd1
font_01_sfnt_off0000c33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33B 10136 bytes
SHA-256: 20ee74fc90a053a0578de2775ee78650a00a113e95c72376babecbf6795f7efe