Malicious PDF — malware analysis report

Static analysis result for SHA-256 1518c987d944c3c1…

MALICIOUS

PDF

86.4 KB Created: 2021-02-27 02:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9afcb3e22187f13415e0534da4c8ac77 SHA-1: 858c78265c23dff02a3e85a00bcaaf5a83fe5a35 SHA-256: 1518c987d944c3c1afa94fadcc6f6c185e79390afadb0c5b8851072ef05fa5e4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference technical support issues, suggesting a lure for phishing or malware delivery. The presence of numerous links on disposable hosting further supports a malicious intent to distribute or redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=hp+photosmart+plus+error+code+0xc19a0003 In PDF document text
    • https://cdn.sqhk.co/woluzadeviv/dibolVK/talking_booba_2.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/bNojjTM/17024081002.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/how_do_i_update_my_rca_voyager_tablet.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/A6Vkhjw/quran_teacher_required_in_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hijji72/incharge_debt_solutions_orlando_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/jnia7Pa/39948909926.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/aAYEjfi/26464156140.pdfIn PDF document text
    • http://wekixelov.22web.org/nesco_18_quart_roaster_oven_manual.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/iso_27001_password_policy_template.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/UhhW7WK/japanese_lucky_mallet_tattoo.pdfIn PDF document text
    • https://cdn.sqhk.co/jilijibimi/blwAjaN/lazinifudirawusevufema.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/CgcfAEc/burawiwalefazadijedusinep.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/mofoledolodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nematamaduwos.epizy.com/jowunowidemigev.pdfIn PDF document text
    • http://temomij.epizy.com/biology_notes_form_1.pdfIn PDF document text
    • http://gonoxil.rf.gd/odd_thomas_books_in_order_of_publication.pdfIn PDF document text
    • http://jinadaxekuxawu.rf.gd/oregon_scientific_thermo_sensor_thr268.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/bhaktapur_tour_guide.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/vaxofelu.pdfIn PDF document text
    • http://waruzav.epizy.com/xojifujilapuraxeren.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/outlook_disable_shared_folders.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_off0001114f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114F 5856 bytes
SHA-256: 8b7183f21cdd860c33e3aefb774c3277f7bbc5c3b81dce21f2e0ea39815d2db7
font_01_sfnt_off00012514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 11348 bytes
SHA-256: d17a28061c623be0d63ebcc0d0b35df39b84ece12a4c0302cf7d5e8f4a61c864

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