Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a9d8b8574779b3…

MALICIOUS

PDF

89.9 KB Created: 2021-03-23 09:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8ab14bd8a049c7d9001b48ce5df902d0 SHA-1: 985f09b545e092f2a102cd76cc397ad6f54ab8bf SHA-256: a0a9d8b8574779b348aa61fd6670bb37d4f34d6ca982c8b94ab2442fbfe2da36
66 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the PDF structure exhibits characteristics of a link farm designed to obscure malicious destinations. No scripts were extracted, but the presence of multiple external URIs points towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • 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://mezovuduw.ru/award?keyword=artificial+neural+network+using+python+pdf PDF link annotation
    • http://genusadnlo.space/66801691996kssd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_604cf16575613.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/what_happened_at_the_end_of_big_little_lies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_60597d38c1e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_602791eade37a.pdfIn PDF document text
    • http://kawlites.online/does_the_bulova_marine_star_have_a_batterytmbq8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd5fd8d0551a.pdfIn PDF document text
    • http://beststudent.fun/varajinexuct9kd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_600f9a5850fb3.pdfIn PDF document text
    • http://nasevozowu.22web.org/vascular_malformation_face_mri.pdfIn PDF document text
    • http://kimagibasip.22web.org/45679044101.pdfIn PDF document text
    • http://axecheat1.xyz/rilifir93rc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503309/normal_600d61d677bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_603d8e54c1386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_6006d47074aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_6049a3c688f19.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/3852237620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_60159c6b7c1fe.pdfIn PDF document text
    • http://nasty666.space/64607319216yhru8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siwojab.epizy.com/nuvotaduf.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/android_tutorial_for_beginners_2020.pdfIn PDF document text
    • http://belukamafanes.rf.gd/unusual_baby_girl_names_yahoo_answers.pdfIn PDF document text
    • http://valedezupejof.epizy.com/autodwg_to_dwg_converter_free_download.pdfIn PDF document text
    • http://devonefon.epizy.com/70172126099.pdfIn PDF document text
    • http://beritoka.rf.gd/38130417395.pdfIn PDF document text
    • http://rudixexo.epizy.com/8495210938.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_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 5664 bytes
SHA-256: 4063c23ea2a55b2162f67e81fc88dc64901b8583d9fb165c7100e44a7cb852bc
font_01_sfnt_off00013353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13353 11332 bytes
SHA-256: 3306d275f1c0a0726f15bde1958fc22da9403db27397bb024d4ab0bc487b18e4

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