Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7cc8285ec8c4fc…

MALICIOUS

PDF

64.2 KB Created: 2021-02-28 10:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eda0ecd6cc1a40d97c6df598adc207fa SHA-1: b1fcee9c955f107043353a8eda6ee14d746dfa6f SHA-256: ea7cc8285ec8c4fc725fe14d3032f08d81901fb4596961d74b64344223888b6e
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs and the PDF structure suggest a phishing or malware distribution attempt, likely using a lure document to trick users into downloading further malicious content. No scripts were extracted, but the numerous links indicate a high likelihood of a phishing or redirection attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=cat+gp30+forklift+manual In PDF document text
    • http://servisvds.ru/crate_and_kids_sheetsapf7i.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/gdjdjck/93794776397.pdfIn PDF document text
    • http://glawerry.online/jefuwipipabusizobakn7cff.pdfIn PDF document text
    • http://dresdenpharma.ru/pamijukomumujampu5j2.pdfIn PDF document text
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/007cdbd.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/gj8gigc/35915936848.pdfIn PDF document text
    • http://remont-pc.website/437797082312sflo.pdfIn PDF document text
    • http://igme.site/free_monthly_budgeting_spreadsheeth68xm.pdfIn PDF document text
    • http://slimerecipe.org/packing_slip_templatevytid.pdfIn PDF document text
    • http://mxbur.fun/mejelivopj45zp.pdfIn PDF document text
    • http://dlkmvkoenv.info/tezikuvanunaztdoy1.pdfIn PDF document text
    • http://jusapp.club/how_to_clean_filter_on_navien_tankless_water_heatermjewi.pdfIn PDF document text
    • http://muldwych.com/525803770952hfb8.pdfIn PDF document text
    • http://dvigatel.guru/brinno_tlc200_user_manualbh0ar.pdfIn PDF document text
    • http://ejqy.com/android_review_notificationsuw6yu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB6 5316 bytes
SHA-256: 1e442295d6413c192fd2a36560b37ba76751f48656fa03e3a481dbeb7efc622a
font_01_sfnt_off0000d1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C7 10080 bytes
SHA-256: 74f8af56c54419ee23548408c861523ace4a7510317cad89a5f6aea18e52f2be

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