Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0e5bc0ac09d0fa…

MALICIOUS

PDF

35.1 KB Created: 2020-11-06 04:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e6eac02ea606aeea54f6551f479e1842 SHA-1: db86f0e3abaec45e3a0e81fb57d16c97692dffbf SHA-256: ac0e5bc0ac09d0fae62faabf5ec82f4b2078a8753ce94b226762a4e61c2f8172
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?keyword=hilliard+davidson+football+scorestream PDF link annotation
    • https://ketatesi.weebly.com/uploads/1/3/4/2/134234598/786520.pdfIn PDF document text
    • https://tavikumor.weebly.com/uploads/1/3/4/4/134476146/3610720.pdfIn PDF document text
    • https://puwukozo.weebly.com/uploads/1/3/4/5/134587621/pokifudeletada-popatufikulo-wuguxaxe.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/7266767.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/e8edb9a.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/pobaxaxosaxuvi.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/jimin.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/e2dd7f52-7805-4e59-af1f-8df038bd3df5/10343223053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7758/0973/files/salitang_magkatugma_grade_2_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/airline_industry_trends.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/736_area_code_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/cabinet_ministers_of_india_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb16234-f749-40b0-9420-ff63eb60ea97/70666792500.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_off00004bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCE 5328 bytes
SHA-256: 4c1c548faf61c8766c88f0c581bd79b292b8d63205bc16cdf8cbd297a9b3e4f1
font_01_sfnt_off00005dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 9932 bytes
SHA-256: 6bb76427c5e471336524e2cf000135092263bb6854bc0c8f99c1652936d1e92b

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