Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88130be425c0b5c…

MALICIOUS

PDF

70.1 KB Created: 2021-02-22 22:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: af59f4687f643f680054489766cb2eeb SHA-1: 3497181bb231f9ab6b518d780a9b16248d8ab17e SHA-256: e88130be425c0b5c0dd709740b5d94d273788d50991e75588dc7a08b31b4544b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to product searches, suggesting a lure for potential buyers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=dyson+dc35+battery+won%2527t+charge In PDF document text
    • http://lavawogufiwilor.iblogger.org/xepumega.pdfIn PDF document text
    • http://naykaryadom.fun/steamers_restaurant_cateringsv2h1.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/ySjdghj/fireboy_and_watergirl_ice_temple_unblocked_66.pdfIn PDF document text
    • http://wemexuj.22web.org/41756258812.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/OXhfhhO/dezuf.pdfIn PDF document text
    • http://bakimebisuxoj.iblogger.org/megajavos.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/dVhdigj/voice_changer_with_effects_thevoicechanger._com.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogigadataga.epizy.com/coordinating_conjunctions_test_with_answers.pdfIn PDF document text
    • http://puxejinasor.epizy.com/bee_movie_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/christmas_letter_stationery_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/9264681827.pdfIn PDF document text
    • http://nelaxufap.rf.gd/foxezuwapuviga.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/86581622805.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_off0000d468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD468 5824 bytes
SHA-256: ad40505a24de3b90b93b961bbc02748cce6f2212096f42790987c8ea9a41bbaa
font_01_sfnt_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 10336 bytes
SHA-256: c7bd453d7036497a276680cd2553f73bc0929325cf535f7a044c0724c5dc80a1

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