Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1048bb883cf056…

MALICIOUS

PDF

57.3 KB Created: 2020-11-08 06:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a45069542d9b4b017b95d2250e70b64 SHA-1: dd8a7b0cb2e7de000af8431f4e3bb96f3c25412e SHA-256: 2d1048bb883cf056d6d32f6b16296a234e586bd41f66f0da134c0faf7f1b91cb
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://traffine.ru/123?keyword=requiem+for+a+dream+book+pdf PDF link annotation
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4d5351fbb209c0.pdfIn PDF document text
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/3e67730df84f.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/vibazefar.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/gezuz.pdfIn PDF document text
    • https://waxovidimised.weebly.com/uploads/1/3/4/4/134446407/2acb9581ed422b.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/db73cb0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://zixenojolamu982242810.files.wordpress.com/2020/11/meranekilug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84b4922-5bf2-46cf-8454-b096dc5ad784/494207971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d26b6bb-92bd-468d-b4e1-a9abca63bab3/simpsonize_yourself_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529aa118-e27c-4163-99d1-ec5e74e24dfa/pretty_girls_like_trap_music_zippysh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2b43b6-dc4d-40ce-b54d-e1856c08c0c2/6249377819.pdfIn PDF document text
    • https://zileluzut.files.wordpress.com/2020/11/jepumolujulomivugesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/984aa66b-4023-455f-ab46-39f9bd364778/10376640363.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_off0000a034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA034 5312 bytes
SHA-256: c626052c917346b4f2de4ce4612889043932b2b4d919861d78e0c7d919e931f6
font_01_sfnt_off0000b232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB232 11636 bytes
SHA-256: 190be5edeca39c2694fb549d8976594f4c099bc283824691dd915d6d5109f544

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