Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f62c0a45be26461…

MALICIOUS

PDF

47.4 KB Created: 2020-11-03 13:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b14582577f847b06c9cfbab30bbfbc13 SHA-1: c92147eb85926355554060b7b91e10f9850e62be SHA-256: 3f62c0a45be26461bfef7120c37697f745dce026a321d358b275ac14bfb75a93
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of malicious links is sufficient evidence.

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://gettraff.ru/123?keyword=sliding+window+protocol+pdf In PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/d5a4cb1870df6e6.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zokare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f894baccd601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f9e479c0d881.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/pipodiboxusagi_rodulogoxeto_xelasafodo_sugokeremoja.pdfIn PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/xopukinunisirevova.pdfIn PDF document text
    • https://kifenefaru.weebly.com/uploads/1/3/4/3/134327755/4cd9926120ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c537323-ab6f-4a8a-8fb5-2ce62bb65198/five_women_wearing_the_same_dress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988817a2-04f9-4ec2-bc86-ace4f1871072/1541873993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4b1ef0-90f4-44a6-9b99-0740bbc42bfc/film_chronicle_2012_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/autocad_export_blurry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8093b90-47a8-4be6-8fd0-1f78d2e9aa19/metro_multifamily_housing_association.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/computer_science_book_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4e330e-8594-40d4-b48e-851ca642bb07/79250232503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ddbdad-8093-4669-80e0-de06bb1e6ef3/65177507255.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_off0000790e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790E 5132 bytes
SHA-256: 7f48630704051978a626ce4a88fd41b5ff5eff24a33c312352b4e8b7958b882e
font_01_sfnt_off00008aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 11448 bytes
SHA-256: 1c42c65a72b5681ba4ec93c2dc5fbd8c6e5763fc5f3c0c32cfda59f0ce5b7a00

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