Malicious PDF — malware analysis report

Static analysis result for SHA-256 521b931722adad19…

MALICIOUS

PDF

45.5 KB Created: 2020-11-05 17:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ce079830d6960d81d0704a6d8f614a34 SHA-1: 3e1bd39382434f3e085042f06576dc94bd9400c5 SHA-256: 521b931722adad19e60bf2a2de77b9256d1cd83f6350c7e594d2479ac93fc20b
126 Risk Score

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://trafffe.ru/aws?keyword=labor+time+guide+automotive+repair PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fa04f29d654e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f8f8b6e3ede7.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/tukebulij_kirusadi_gagejofekoxuz_muxarapiduker.pdfIn PDF document text
    • https://detalejutapebis.weebly.com/uploads/1/3/4/6/134610814/toride.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_5fa34e860ffc6.pdfIn PDF document text
    • https://bumujonawomete.weebly.com/uploads/1/3/4/4/134435367/xefegil_bejur_gebularuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8c1655ee814.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/08b32c73bca8d.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/e672fbfe327f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f9da41d1bbd0.pdfIn PDF document text
    • https://falerelijiwega.weebly.com/uploads/1/3/4/6/134612416/mevonodi-xisugiwop-galesujuzelomum-gogiku.pdfIn PDF document text
    • https://tosufiriro.weebly.com/uploads/1/3/4/4/134472590/rebuginewapa-todazese.pdfIn PDF document text
    • https://fogiboxumejak.weebly.com/uploads/1/3/4/5/134518377/ad0adfe.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/fikuvine/after_effects_particle_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/el_profeta_khalil_gibran_sobre_la_amistad.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/best_place_to_cook_osrs.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_off00006812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 4988 bytes
SHA-256: ccaa936f587c82a9014a69d67adda3b574c79d3b4cfb10233ef0d7faab093425
font_01_sfnt_off00007911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 9936 bytes
SHA-256: 123013de9a3fef7f4305b71d65c434ece67ae482acf598816dd24361add85af1
font_02_sfnt_off00009b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B19 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e