Malicious PDF — malware analysis report

Static analysis result for SHA-256 018e13480d177a57…

MALICIOUS

PDF

70.0 KB Created: 2021-02-10 16:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e10b390d1cc43fdab8609e642b27d3fb SHA-1: 694e7705d53da90dbe2751f43378baef12672292 SHA-256: 018e13480d177a574dbe7e2318e7bf008b0a946e696305fc6fe41223233f6d88
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

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
  • 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://jottigo.ru/123?utm_term=irobot+scooba+5900+manual PDF link annotation
    • https://sozulidalipidin.weebly.com/uploads/1/3/1/4/131437061/1592325.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/hjeOhbR/kapomosilatosok.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/PgcDShb/vefuni.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/pavokaboli.pdfIn PDF document text
    • http://wizudaneku.iblogger.org/wavuket.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/a2201f.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/jhoorgi/66519572092.pdfIn PDF document text
    • http://alifan.store/blank_map_of_canada_printableq7r66.pdfIn PDF document text
    • http://kijorifoweb.22web.org/programming_fundamentals_coursera_answers.pdfIn PDF document text
    • http://domifonupesif.iblogger.org/64780095161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwularofevomu.epizy.com/autocad_architecture_2020_tutorial.pdfIn PDF document text
    • http://voxotili.epizy.com/how_to_add_filter_in_excel_spreadsheet.pdfIn PDF document text
    • http://pisobak.epizy.com/zuxefovenibesumipu.pdfIn PDF document text
    • http://nufisat.epizy.com/free_online_books_app.pdfIn PDF document text
    • http://meraxemuvixise.epizy.com/64008775167.pdfIn PDF document text
    • http://peronilekovo.rf.gd/madesenagizazivilixolup.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/antelope_audio_orion_32_hd_manual.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/linux_server_patching_interview_questions_and_answers.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_off0000d605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 5444 bytes
SHA-256: 241fdf69e1e62f54c39129cc6ef83931d70290cd3f397efe9cef2825bf71341d
font_01_sfnt_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 10116 bytes
SHA-256: 2cd9d635ab72b45cd29c7b62188974869204d172cd06d0f8706c7e02bb2a751c

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