Malicious PDF — malware analysis report

Static analysis result for SHA-256 3869f08a3ae803bf…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 13:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 39fe150ea4178c24402a104efa353c7e SHA-1: b32c48ec7e2f897e7d057f636908e227fae4f8ce SHA-256: 3869f08a3ae803bfcb4f55323529508e09afeffe6669f7f501e13a86d1b185fc
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs, such as 'https://vilenefex.ru/award?keyword=icecream+pdf+converter+for+windows', are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://vilenefex.ru/award?keyword=icecream+pdf+converter+for+windows PDF link annotation
    • https://cdn.sqhk.co/naxokujim/achgjxQ/nitumaworaritedabir.pdfIn PDF document text
    • https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/vetagijejevajoku.pdfIn PDF document text
    • https://lamuwibosuzo.weebly.com/uploads/1/3/1/0/131071033/db6711bb540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_5fd8801f106b1.pdfIn PDF document text
    • https://cdn.sqhk.co/xelimibela/0iihfij/74154181086.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/pijjjhj/nikilire.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/hNygjWQ/fidefegibepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_6017b9fbe1d38.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/jhenjrD/guwuxajod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_5fed6a05107c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446502/normal_603d2ce3a444f.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/78aPbK0/23694369232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493200/normal_6028239943115.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/X0LJlig/travian_kingdoms_wiki_treasures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5fede8320f67c.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/ko7Enhf/solid_color_wallpaper_peel_and_stick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_604666592a786.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/30943344239.pdfIn PDF document text
    • http://delinapod.mypressonline.com/diwonalalek.pdfIn PDF document text
    • https://cdn.sqhk.co/sitosuduf/LhaZCxo/88877603853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/seeds_to_plant_in_january_florida.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/8848412041.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 5360 bytes
SHA-256: 065e7e13f64cbf01741a2e3342c945fcb6e144ad32e558bd73663f4729871058
font_01_sfnt_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 10928 bytes
SHA-256: 1625680802a406b0d8cf073b74a44f8601cc09d85d427edd902903a79a8cb916

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