Malicious PDF — malware analysis report

Static analysis result for SHA-256 447097c92de1541b…

MALICIOUS

PDF

41.7 KB Created: 2020-11-06 01:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab832123c02b79b30137bd4760a1c2b7 SHA-1: 12d99fd9b8a7ef47585547300aa09807fedcdfb6 SHA-256: 447097c92de1541b41e5549db8e0dbc836bad3417f46f06cb33eb8ad58edbccd
126 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting services. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to manipulate search engine results or redirect users to potentially malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/aws?keyword=rose+poems+for+friends PDF link annotation
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/1a4bb23f.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/3128037.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/10515cd8008.pdfIn PDF document text
    • https://lusefova.weebly.com/uploads/1/3/4/5/134583673/16bd9ad35a6e.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/rolozora_podobuwizanadu.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/nakomujuwevi.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/097d883c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/83099633045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2118/8251/files/madizapokopoxavijuzok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8526/4546/files/ohms_law_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/shoe_show_madisonville_tn_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8945cb75-8d8e-41af-9579-2879aa894076/torexorekoxofofak.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/32713340637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8161a66c-2477-4fe9-8502-ea2c2c39a56c/phineas_and_ferb_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34776a57-d7e5-49cb-83b2-16889ff6b8dd/88928136721.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_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 4952 bytes
SHA-256: b31ec9eb1ef474093be592a49b062b07d7b59394274ea22e22279546bb349cd7
font_01_sfnt_off0000776b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 10148 bytes
SHA-256: 11de01318e60470bedd54ad1f5d244421e192d157f9b28a9a257e3c8d4647874

Open this report in the interactive analyzer, or submit your own file for analysis.