Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14b4cd4fc9d26c9…

MALICIOUS

PDF

73.7 KB Created: 2021-02-15 19:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2226fbdc3469cb3504f51a4ab18c2627 SHA-1: 23c82bc94758b9b275185a6f59e18bae9267eebd SHA-256: d14b4cd4fc9d26c928cb18d80224ad139195a291579fb6804c3111134b8d9610
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

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/strik?utm_term=java+swing+client+server+application+example PDF link annotation
    • http://begdas.space/401924602272n76n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5fe599627c5d7.pdfIn PDF document text
    • http://shopbest.online/whatsapp_software_for_pc_windows_803rcx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446944/normal_60184829acce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_601b0ae717eed.pdfIn PDF document text
    • http://dutov.org/lekajavemizozaguduvowefm48ss.pdfIn PDF document text
    • http://muldwych.com/custom_slot_car_track_builders8sirs.pdfIn PDF document text
    • http://septiki-rf.website/lactase_enzyme_lab_answersuyd3n.pdfIn PDF document text
    • http://deflecfcvy.best/10932787147yzmp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_600adbe2560d7.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/stick_war_legacy_video_gamezcfji.pdfIn PDF document text
    • http://grizhoff.ru/change_color_of_text_messages_iphone_7owafp.pdfIn PDF document text
    • https://cdn.sqhk.co/japedovak/SFhgO3n/deer_hunter_2018_gameroom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitoritobo.epizy.com/guidebookstgc_snagfilms_com.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 8

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_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 5460 bytes
SHA-256: 8132016328d7ae297313345f42aa7ec7d69ae96168c86123e9ec18741c76bd56
font_01_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 11132 bytes
SHA-256: 3e6bb68ea3e852b1053872759a59ddc9ebfa1d46e0da290398d9a9fcaab81641

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