Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28b103ae24429bd…

MALICIOUS

PDF

76.1 KB Created: 2021-01-18 08:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: edb9027865ebe85a3b717e4e2642e17d SHA-1: 74df55addd19b0c4ed4eba6b9169daa177d28e8e SHA-256: d28b103ae24429bd310e6f1aa1246826a22f9a049c5bec5c87cb12d99dbdffab
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with one pointing to 'traffset.ru', suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting a malicious intent to distribute or redirect users. No scripts were extracted, but the presence of embedded URIs and the overall detection profile points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?utm_term=personal+statements+for+primary+teaching+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5fd5fe5a7035d.pdfIn PDF document text
    • https://site-1182839.mozfiles.com/files/1182839/24270817048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5fa28bb2b0b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fc091a66a43a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5ff5886f7b5a4.pdfIn PDF document text
    • https://site-1177364.mozfiles.com/files/1177364/solar_system_order_acronym.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/vogubivajavofu/casio_g_shock_solar_watch_manual.pdfIn PDF document text
    • http://dojidusajotat.epizy.com/98782736018.pdfIn PDF document text
    • http://rakemexovujepez.epizy.com/sesulebo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/46453816653.pdfIn PDF document text
    • http://temekem.epizy.com/95811176078.pdfIn PDF document text
    • http://pudekixepubaz.epizy.com/38195475674.pdfIn PDF document text
    • http://lepeporiluvoxaj.epizy.com/d-_link_des-_1210-_28p_datasheet.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/attila_total_war_ere_campaign_guide.pdfIn PDF document text
    • https://tinyurl.com/y98g6hxwPersonalIn 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_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 5748 bytes
SHA-256: 3b00dd73dffa82ce5fe89cdded424bb0d8936f58e2942404be9dba506dbea695
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10168 bytes
SHA-256: 96c121292c4e13bdc36facb8ad030ed8c0224b6e6dd033047173b4bfce353213

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