Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e3099cf684c186…

MALICIOUS

PDF

51.4 KB Created: 2020-11-04 23:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 50759ba219dab4178c0c89928ec1df4a SHA-1: d75406b3a259bb2f14bb9c8a624aafd1121eadaf SHA-256: 11e3099cf684c1869aee04ad8ed8379891b9700b0b8f9fd94a94a992363409a2
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=hack+war+robots+without+human+verification In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5f9dd8aad0c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f88256bc69f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f875a6145079.pdfIn PDF document text
    • https://faxuledobiwud.weebly.com/uploads/1/3/4/3/134311760/3152017.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/rodupewure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f9d11653123e.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/8163428.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/d23881b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f9593cd2aea0.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/mufozepalem.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/mipeboro/22812220886.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/budgeting_and_financial_planning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef7a3dc-33c4-4307-a9a1-774e90e51b3d/kojinifimuvakuxevotuk.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/promo_heat_heat_press_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939cc44b-6e64-440e-887b-b2ddaae801ad/the_legend_of_korra_turf_wars_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/poboverazaboledexetej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 5288 bytes
SHA-256: e711b9d93b9b8f3fc617f41297b95b771132ec8f98856c804332c7123c1730ec
font_01_sfnt_off00008b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B09 11448 bytes
SHA-256: 7d1e2c247c202be10db738c216cb57a0733a976c7a4653544e967c9924fd2283
font_02_sfnt_off0000b1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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