Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa37c198540d291…

MALICIOUS

PDF

77.3 KB Created: 2021-03-13 16:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: bd9b0afddea77f91dafa4de1697fbb11 SHA-1: ba0ad1de27a4bf612abf11e1767ce0a7bf217bda SHA-256: 3aa37c198540d291bb8647313206e4bb87e8dd7e21bff92016d871eaa4f98863
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with several pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the ML classifier. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, suggesting a lure for users seeking specific applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=torque+burnout+mod+apk+unlock+all+cars+download PDF link annotation
    • http://sugameloxufe.mywebcommunity.org/cuales_tipos_de_sistemas_operativos_existen.pdfIn PDF document text
    • http://limons.space/thriller_romance_novels_read_onlineeicvn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_601b74fdb295d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fc608782beb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5ffe2a5d4ede1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fcc7b2ed629f.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/rorudikoverevuvamo.pdfIn PDF document text
    • http://secret-empire.ru/12580316681tg2f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fe550f924e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_6049a79f39b76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_60069bceb321b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_601bb8330edef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_602b94f2d0fc0.pdfIn PDF document text
    • http://afracheat2.xyz/nci3x.pdfIn PDF document text
    • http://hookup757.fun/xulimenuvepaak48a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6006af67d69d6.pdfIn PDF document text
    • http://dresdenpharma.ru/ninja_professional_costconxj06.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/55f0696c-2dea-4e0a-9cdb-2e9d5245b133/228486062.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/vomokomovesakasogojetof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ed0232-4d21-4c4c-8901-e6b3dba7337c/percy_jackson_film_1_streaming_vf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9e2c35-387f-4136-bf40-750a7c676a0c/troy_bilt_weed_eater_attachment_parts.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/xegefubuvitibadanidenab.pdfIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/wibakeduvimowiwolujozim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd73601-87ec-4692-9fd0-9e504f883166/everstart_maxx_k05_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1627b65-75f6-4642-b8fb-eee819c91155/what_is_median_family_income_mean.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_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 5592 bytes
SHA-256: 11208fcdf0771230dffb09e741c34b0f9707e67f986f309660428b1ac800bc96
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 10832 bytes
SHA-256: caccfd433f0d03080f370a550ca9d103396c1bf3f358a817bea966b7229cd87b