Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ace6983592011d…

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 03:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cc45feec6af1d0d6267c8efc3d53fc04 SHA-1: 702a5caa0be7a28eb2e8579fafa71a85a6cb34ed SHA-256: 85ace6983592011d68fe1d5b4a4d93c939ad7235660b181298f4b5e268e64d34
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The PDF structure and embedded URLs point towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://chcial.ru/uplcv?utm_term=mi+tv+box+price+in+bd+2020 PDF link annotation
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/40648117663.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/77177091711.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/rebutaretopanabeluses.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/57518430992.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/69527323220.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210915210424.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343ac23f8ac---wapovonazevam.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/gunuzarefalurokuwopu.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/madugulisetij.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/redebubowep.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8sb4n6fsro1rl2g0blgskfpkj3/bepijidivosiro.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/2523694528.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/nipafozedokitovopukefoka.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/ninenipekipurifig.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/visedinirezidu.pdfIn PDF document text
    • http://sb-78.ru/files/file/67615903855.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/xadavet.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/pobexizusuvanexiseve.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/sobugumewefevajaz.pdfIn PDF document text
    • http://355353.ru/userfiles/file/11112810895.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/ziwalekapifamiximo.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/48567821240.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/kavejodimog.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 19612 bytes
SHA-256: 312f03fd4db4141b0cb24c7ea5987e412a1a5dbdecc1b70d99b9ba9606600d6a
font_02_sfnt_off00012ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC4 10672 bytes
SHA-256: 9ea5ec584fa8f0ab5f12eb85f6f4784a48fb4f5dd392ea9b6dafbef468cf0d41

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