Malicious PDF — malware analysis report

Static analysis result for SHA-256 19202b03a3795bcb…

MALICIOUS

PDF

74.0 KB Created: 2021-02-23 03:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9d61906cacdab9a0c2d8d81fec9cb62f SHA-1: 1697961e4b6b274a4545040313318216c2000022 SHA-256: 19202b03a3795bcb20f38bba5cf3214b183411f7ba449cc613060b6d98cee02e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm on disposable hosting. The embedded URLs and document structure suggest an attempt to redirect users to a network of sites, potentially for SEO abuse or to serve further malicious content. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is a common vector for malicious redirection.

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 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://jottigo.ru/aws?utm_term=how+to+make+origami+boats+that+float PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423454/normal_601908e9b17d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5fc8c09030b09.pdfIn PDF document text
    • http://talakam.space/wepuzisuvukokaziwanaj5khro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469145/normal_6033b7404d386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420036/normal_5fde65339e885.pdfIn PDF document text
    • http://degitowexara.iblogger.org/rsum_cours_algorithme.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/ski_jump_game_online_freed8lcu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461780/normal_5fe2d7f1f28f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5fe797998a7c8.pdfIn PDF document text
    • http://dkblogin-de.com/butikutefivisozuvokunlz1kx.pdfIn PDF document text
    • http://hihikane.space/niwavuripazitezoc5fnb.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/jejhQhb/splash_wines_shipping.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460042/normal_5feda18cb96fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_603253ba9d68e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisiziwaros.epizy.com/tonaruxalomuwidaram.pdfIn PDF document text
    • http://jobiduleger.epizy.com/2456169065.pdfIn PDF document text
    • http://takerowul.epizy.com/73275330771.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/12501291139.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_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 5436 bytes
SHA-256: 25783da6204cab3087b4803437515ebf13bdb5a4dd8d7ef92f33ec49f5bdc50b
font_01_sfnt_off0000f5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 10836 bytes
SHA-256: 5d922e01bf1b56f296443ffdb2d6ff0c437a9866f0b570e32d3a087c8eca9417

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