Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a37291c7ff4212…

MALICIOUS

PDF

46.8 KB Created: 2020-11-07 12:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0d75f582a122943fb14a01e1f5b97b24 SHA-1: 32c3084cbd2cc4bd805bf1c90a53281397c9a53c SHA-256: a0a37291c7ff4212ce47ff088c02435992befea287a097cba7c7bfd4e93cf5bb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=homes%20for%20sale%20by%20owner%20aztec%20nm PDF link annotation
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/1320551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8d36998b362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f99ae564704e.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/dasimop.pdfIn PDF document text
    • https://reregixezoxo.weebly.com/uploads/1/3/4/4/134461721/futivomomuwizi-januzewelekigi-jujuvibowi-patijizixemufeb.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/gupilogipupagip-joreku-juferagod-favovijodaf.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/1734890.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/7c2eddd8-a131-4f1c-9eb6-4b9df6170b86/the_excellent_wife_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3de1b3-8fe3-48f5-8993-bb6c5002fc73/graphing_parabolas_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34647bc2-7959-46b5-b75d-270351118f6b/android_tv_apps_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d557ab-63b7-423b-8b10-d8de822c76a3/20721426286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1903cd8a-3d41-4fda-a567-2112aa76c821/birunisexekepekipubom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9888f6-749e-409a-adea-73904f8ad24a/63852811962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1587a73c-0864-4d3d-940d-5de79996c51e/40072820984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070d1c13-305b-4281-8250-715073f520d6/reefer_temperature_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd6d756-08d1-42ee-b403-40b59593fe3a/xepubofoxurazeti.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_off00007742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7742 5372 bytes
SHA-256: e2184d9bf4368d433ec8540627e45fe7a304f45a4b8be1603eb20c2f78e40cb1
font_01_sfnt_off0000898d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 10952 bytes
SHA-256: d4ef694e1615a670a4da8e01eaa38c2674b94f71880dc807cf7f73dea1b7b1fa

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