Malicious PDF — malware analysis report

Static analysis result for SHA-256 50db871361f404d5…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 12:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c9697af42ce03383e8ed1269fd97666 SHA-1: c34f83bb7ddc11c05f2541949ccbf97464e87d37 SHA-256: 50db871361f404d5625ed4793b10c8f2624158fe022392b04b1638fa71c2f68c
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, including one that appears to be a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a pattern of hosting links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://cructi.ru/uplcv?utm_term=geometry+dash+apk+full+2021 PDF link annotation
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/keronizobudizuwuxip.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/xarudew.pdfIn PDF document text
    • http://huiking.cn/uploads/file/040133039259.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/wunofosupa.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/38956224804.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/57019130005.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/benilowixogiga.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/suzufojex.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/ramapozugenodeka.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/85234251937.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/77705428942.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9145479ce---fuzasenifogewi.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/goxegotefufovul.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/jibepofofemoxevuk.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/12873020140.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/fipokosovijegiwebaroseme.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/jopatodufadumibeno.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/wosirasurivokupubiju.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/55345260223.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/48509344475.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/91399727072.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/50419379005.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/nokujavuxo.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/65694195737.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24B 18472 bytes
SHA-256: d21a9ad463353451eafb5605ef90424a90fe03602cfbdc2cb1e0ad9e5f42d58b
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 11204 bytes
SHA-256: 7857fc3a3310ca8ce68e763e000fcb2bb75f5cc9d7c83d678d68e0af99988473

Open this report in the interactive analyzer, or submit your own file for analysis.