Malicious PDF — malware analysis report

Static analysis result for SHA-256 734ac12817a2f5bf…

MALICIOUS

PDF

52.4 KB Created: 2020-10-29 11:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 79c7ad8b004d9ea159c609258b9ecda3 SHA-1: e6758f9877eeb0c5c45d03cca5d0e0bab0ddbe1a SHA-256: 734ac12817a2f5bf59ba273d4f896b28e0399b27d1e4ad4b9e8d8990a12b9e47
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute malicious content or phish users. The ML classifier strongly flagged this PDF as malicious, and heuristics confirm it links to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to potentially harmful websites.

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 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.
  • 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/wb?keyword=educational%20psychology%20theory%20and%20practice%208th%20edition%20pdf In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/nijefakipo_fijesafelajesow_gumujaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f9a156288868.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/7e80ea1ac1c2f59.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/220fda354c08a.pdfIn PDF document text
    • https://damuxuru.weebly.com/uploads/1/3/4/0/134040763/basefofamuzirisodol.pdfIn PDF document text
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/ac950fbdbc41f.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.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/36b32ec5-906e-433b-bbb0-b234275914b1/44974604659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d975d4-9855-41a9-9f0a-409f55941216/wegikaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3937e3b2-2947-40bd-b8ed-8ad1f010348d/97461048090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e47c13c-389e-4a20-82f9-2290457fbe4f/pasutapevigar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854a0461-1b17-4297-a11f-25fe3716ebf8/salakak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a162610-e95f-4935-acca-0a2256ce86cc/49467052800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f906bf-86b8-44f0-8845-a2958d5b178c/direccion_de_marketing_philip_kotler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79ddae1-4e8f-477a-bdcb-8b8040218d0a/20_unit_apartment_building_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c0632e-a830-4fa9-b952-e0248aeb1c08/78350156188.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_off00007f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2B 5552 bytes
SHA-256: 5fdaaa354246a6b6305f0c4fcafd10ce34801ca50b747e866e549241672a3a25
font_01_sfnt_off00009206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9206 10516 bytes
SHA-256: 02d049d4e1f6a7a76e978c0681420f8dec9cab4e4cd7399400714c6a70cc49fa
font_02_sfnt_off0000b572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB572 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34