Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79cc75fcbcb3c34…

MALICIOUS

PDF

75.5 KB Created: 2021-02-19 00:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: accb21e830e4dda45e2f25f5570ec17d SHA-1: 9182e955c7466f88a4ce2991fb44438b353d5a8c SHA-256: f79cc75fcbcb3c342309fec56a671468a262905a32726641561fa2d372253b00
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The primary URL, 'https://druttle.ru/wix?keyword=csr+racing+2+mod+apk+reddit', indicates a lure related to a popular game mod. While no scripts were explicitly extracted, the presence of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/wix?keyword=csr+racing+2+mod+apk+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496582/normal_60291f101be9f.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/7f46a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_602b4d4692b56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5fcc5e5564c01.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/samsung_50-inch_4k_uhd_smart_tv_sam-ua50ru72008w0wt.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/9033273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff2f1415032d.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/3497370.pdfIn PDF document text
    • http://mon-cmbretagne.com/77310106679ntlhp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_601c9a9f9d36e.pdfIn PDF document text
    • http://winoorama.space/tamilrockers_hd_hollywood_movies_2018_freelzchr.pdfIn PDF document text
    • http://obzorov.site/orange_smoke_pngdgupi.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/c45f7abdb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/catia_v5_formation_gratuite.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/ativar_windows_defender_manualmente.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/meiofauna_identification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/bhojpuri_film_video_hd_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/vcenter_server_appliance_6._5_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/avery_template_5366_for_microsoft_word_2016.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_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 5460 bytes
SHA-256: 21091a14d4bc087f86de92422a02ef8032a831c4fa6c3a35f446912a9233f4a5
font_01_sfnt_off0000fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 10160 bytes
SHA-256: 1c649cc7299c6a3c046ec0add1d46a85b81b2ee9890442d008ba982b7a3f6f28

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