Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb1141e9c104461…

MALICIOUS

PDF

82.2 KB Created: 2021-04-28 01:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce1b23ab943a9bdfc94d5d1525cd7a46 SHA-1: dd20ace8849d3980452c957860dc0d9765daa305 SHA-256: adb1141e9c1044618c736f58b4a5d1c5d5856e13428ce329c2a0639bf1c50713
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://dugedepap.ru/strik?utm_term=why+is+my+hp+deskjet+2630+not+printing PDF link annotation
    • http://komomutuba.22web.org/4371088880.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/zhdEgiE/t_mobile_near_me_nyc.pdfIn PDF document text
    • http://rojuwegezuleve.iblogger.org/veboku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5ffe708079291.pdfIn PDF document text
    • http://givavipuj.iblogger.org/canones_de_belleza_a_lo_largo_de_la_historia.pdfIn PDF document text
    • http://lemixop.iblogger.org/internet_radio_broadcasting.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/medical_laboratory_siwes_report.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/certidumbre_riesgo_e_incertidumbre.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwodemo/jhherjh/miwetafafomixanexebuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_6038d223841e5.pdfIn PDF document text
    • http://texulateniz.iblogger.org/jutazobanud.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/brute_force_password_python.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wepogevadapafa.atwebpages.com/52744813389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0e2ef8-5f9b-44bf-a7ef-4e5865e486b5/digestive_system_crossword_wordmint.pdfIn PDF document text
    • http://midejoxujonaler.rf.gd/99875548882.pdfIn PDF document text
    • http://sabedixuj.epizy.com/forma_de_transmisso_da_ancilostomose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aacdca5-2aa7-4f77-81a4-c9ace9843c84/monitor_cardaco_com_cinta_speedo_80621g0ev__bom.pdfIn PDF document text
    • http://furipurisebete.onlinewebshop.net/weguwo.pdfIn PDF document text
    • http://kepisuv.epizy.com/68888626060.pdfIn PDF document text
    • http://padanejelupe.rf.gd/48346638537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 5768 bytes
SHA-256: 6fe2157977cfb10eb5d3c3cfb3650da7b8a10198de76091eb6fb0fccf00b1fb9
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 10948 bytes
SHA-256: 97216dc626c65688caa5c2465dc13b88a59ddaf4d794ea9ab31e2a1ecc301e7b
font_02_sfnt_off00012b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B51 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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