Malicious PDF — malware analysis report

Static analysis result for SHA-256 6334ce0d8de7f8ad…

MALICIOUS

PDF

79.3 KB Created: 2021-06-06 17:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c110259fd780de25de0c24facc68e11f SHA-1: e921ffcaa3f2335d365ece13a6ae544b42bae77a SHA-256: 6334ce0d8de7f8ad01975d9ccc68b3f93cddafb0570dccff127231d2b1932a00
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm, with several pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jottigo.ru/123?utm_term=aradhana+movie+telugu+songs+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450156/normal_5feca17ab5cc5.pdfIn PDF document text
    • https://kejazomunago.weebly.com/uploads/1/3/0/7/130776678/984f42dab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5ffad2ae0794c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fcf5bbac1065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fc6cf98ac023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_6024c48bb21f4.pdfIn PDF document text
    • https://lovepugijojuz.weebly.com/uploads/1/3/4/6/134672364/a6c2062f7fbb656.pdfIn PDF document text
    • https://figeneluniw.weebly.com/uploads/1/3/4/8/134857588/rufojepelanoja_dovofe_satonutefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_60b7991f23fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_604d10bca2c5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_606241ad45576.pdfIn PDF document text
    • https://rozinefowo.weebly.com/uploads/1/3/4/5/134576391/kamolofirin_vurikukep_gadafego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_603e6667bd15e.pdfIn PDF document text
    • https://jefibapo.weebly.com/uploads/1/3/2/7/132712451/binusa_wedufu.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://uploads.strikinglycdn.com/files/60d2db13-92c2-4199-82bf-8451c76e029c/what_belt_is_jocko_willink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b46c8a-be77-411d-a62f-37e4f9ba3d4d/76174757100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca21b0ec-9216-4762-9382-c6e1061ac4f2/jbl_xtreme_2_vs_charge_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd4d931-ab48-41b2-ae88-75ac609355af/nail_shop_near_me_open_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420c720f-a590-4954-be87-83eac736dd50/lowudoruvubiveluwop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4e8d3a-18c3-4a90-9cfb-133de1ba0565/kinkos_black_and_white_printing_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f32e5a-7cec-48a0-b3c9-10fbc2454f4b/94550035650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55b3fa8-068c-4aa6-8bdf-0bf05dddb0b7/82526680223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8c6582-94cb-44bc-8abb-d2128a4d35a7/rozajepegudijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e07462b-ab66-4fac-923a-767427175bcb/77091801252.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_off0000ea39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 5252 bytes
SHA-256: d762d3087ea17c44e14722780932a094efec8a14b3f1315287b19e1a0b22a519
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 10940 bytes
SHA-256: 98b5a56b44ccf0079ddcef291cbcb65a4529227e2f629ff3aa58bde5511cf1d4
font_02_sfnt_off0001211d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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