Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc080ba36d167c5…

MALICIOUS

PDF

64.2 KB Created: 2021-03-02 20:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 63ee911fda206b48fbea01419ff71002 SHA-1: fecdc998062394ff2d327e13f5026fdabb59151e SHA-256: bdc080ba36d167c543c82bec7ff19ba9b8dd627e64becb06abbe122f303a1d4f
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links pointing to various domains, including known malicious redirectors and disposable hosting, suggesting a link farm or phishing campaign. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary malicious functionality appears to be the redirection to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=cisco+7941+headset+adapter In PDF document text
    • https://cdn.sqhk.co/givujelised/jd2iejf/xekug.pdfIn PDF document text
    • https://kegebexik.weebly.com/uploads/1/3/4/5/134590944/kijanapi_wowufek.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/haib8hd/get_cash_same_day_loans.pdfIn PDF document text
    • https://zadefiwexosufe.weebly.com/uploads/1/3/4/6/134634331/kofapexagoxivu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/bvyWPjg/bmx_race_bikes_for_sale_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/ebEGLje/keeper_password_manager_hacked.pdfIn PDF document text
    • https://nejaxadutoxukax.weebly.com/uploads/1/3/4/6/134622523/e1c11aeea.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/7751563.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/pjjhg4R/ballet_classes_for_toddlers_in_dallas_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/ehfjcif/buzajajagitigalifalesas.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/sefamotoputunu.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/7psiet6/karoj.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/SYijRH9/gmail_app_for_windows_desktop.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/fEHeha8/virtual_music_mixer_dj_apkpure.pdfIn PDF document text
    • https://zipusuborulam.weebly.com/uploads/1/3/0/8/130814510/559329.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/cjilheb/zejak.pdfIn PDF document text
    • https://cdn.sqhk.co/niwuruba/ja3hijb/titan_quest_review_android.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/ihg3jfP/international_business_game_board_hd_images.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/pafuvezu_getatolekelu_pesutitumi.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/gjh6cje/solitaire_ring_settings.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF00 5412 bytes
SHA-256: 00bc149575d8aa31307051331ec082acc966ed6798822be824ede60cdf48a5ef
font_01_sfnt_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 10116 bytes
SHA-256: 6afe7208fa58d41014710e2b9c46438a1d2be4a03ab74cc6f6552a53f037233a