Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b0491dad6d6fc0…

MALICIOUS

PDF

39.5 KB Created: 2020-11-01 02:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 35654a555abb32162bb2d1da92be877a SHA-1: d291b17c446828bd5c3e94ad6e168ea4a07554e9 SHA-256: 00b0491dad6d6fc06f3faa97a0ba404eb99a436c4a854d6e436fd2bbd6e0c86d
132 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/123?keyword=persian+in+use+anousha+sedighi In PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/34c944c6ccc0167.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/7e12586af701d5.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/5866567.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/damizokivovi.pdfIn PDF document text
    • https://mimoberojatef.weebly.com/uploads/1/3/4/3/134316463/jilozolamakubew.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/8536469.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mejawiwomak/nesemigakalibopakotikun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708bb018-97d4-44bb-b632-c72189751980/kuwawujin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6135/3889/files/how_to_download_super_smash_bros_4_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6649/7445/files/ariel_the_tempest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a73714-4616-4ae4-8bf3-1e37d4001ea6/6914028844.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E5D 4860 bytes
SHA-256: cca4555690e0ac505103f5965444ef21bd3c8b4420e71b987017e908d1bc4063
font_01_sfnt_off00005ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC6 10804 bytes
SHA-256: 052141a5e0be4caee7715a898205ce4285b48a054dcb774097be09184d44a2b4
font_02_sfnt_off00008387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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