Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0edfb3ee5f56c1…

MALICIOUS

PDF

47.1 KB Created: 2020-10-29 19:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8f8591f6d4f028503d0c94ee774f9f06 SHA-1: dd199f45c2e61c5ce1759fb03502f1edd19437bc SHA-256: 1a0edfb3ee5f56c1b7b487f4c15eaebdf80d23fdaf7a04ce406cecc35c1b4bfa
124 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a malicious domain, disguised as an 'employee of the year nomination form template'. The ML classifier strongly indicates maliciousness, and the document body, though heavily obfuscated, contains the same malicious URL. The presence of embedded URLs and the nature of the lure suggest a phishing attempt to redirect users to malicious infrastructure.

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://cctraff.ru/strik?keyword=employee+of+the+year+nomination+form+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f8c8697c613b.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/c437f4.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/7294463.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/8795223.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/9441920.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/gafev_jifafebow_samuxitumu.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/poxekuzolaperapov.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/eec4edab532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/24634232046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9001/5904/files/pallet_playhouse_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc1e345-9da6-4c74-bf3b-b90996e587f0/3393070202.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_off00006f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F31 2960 bytes
SHA-256: d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796
font_01_sfnt_off000079b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 5024 bytes
SHA-256: 98c725091bacba3589ca19330aab69ba68300be3f9e94587e42caa038cd40854
font_02_sfnt_off00008aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 10652 bytes
SHA-256: 669e254873549231e318e33da965b7585990d5c5377edb262d1eb3fe26988fce

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