Malicious PDF — malware analysis report

Static analysis result for SHA-256 d619b02f09886be4…

MALICIOUS

PDF

74.3 KB Created: 2021-02-14 23:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 275b535faee5250c813ae97bacd9d2ac SHA-1: 8f74de109687a2719b069998a75d734f37d92667 SHA-256: d619b02f09886be4ed2959ac278c72f3bd77fdc15d7f7807ed6606b193275771
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=what+is+the+silent+boy+about', likely lead to phishing or malware download sites. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=what+is+the+silent+boy+about PDF link annotation
    • http://7lessons.website/mekevemezftxz0.pdfIn PDF document text
    • http://ek-arenda.ru/chrisette_michele_songsyuqlw.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/Wwjhhgg/50013228005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_600259a75cebd.pdfIn PDF document text
    • http://subonus.ru/tazuteahdg5.pdfIn PDF document text
    • http://dlkmvkoenv.info/commission_based_contract_templatee31ay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_600ea6540e1f0.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/godzilla_aftershock_download_freeezxmh.pdfIn PDF document text
    • https://cdn.sqhk.co/bisegepamitu/7wxihgh/first_aid_kit_for_carpenters.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/wjanzp7/2234272626.pdfIn PDF document text
    • http://agentsoft.space/cambridge_primary_mathematics_challemjaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/lajakukilo/eXBidf9/vokejanejenipukon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_601032737245e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_6022c58f6d093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_600f8d11e95a3.pdfIn PDF document text
    • http://brosbass.com/79831586541rfinx.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/vikukinumet/77507259795.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 4932 bytes
SHA-256: a39da20bd9b3883f2f32f75210ac7b2cb1974ede8f50fc8aad87444fe532d96d
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 11116 bytes
SHA-256: c1cab4e183056a0bf8697f30d2a3b5cd7411674d173fb9e5589ac97f7d58147a

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