Malicious PDF — malware analysis report

Static analysis result for SHA-256 06392071b2a2b3d6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 01:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c540d26cf827f9dbedb4de30633ee301 SHA-1: 031d276d305eea25bd9ac0d529b8b82ce0eab4d7 SHA-256: 06392071b2a2b3d64f8ab4f7437a3413b915e5dac8bf5c41fd0bfe4f75935ccb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external sites, consistent with phishing or malware distribution campaigns. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=aplikasi+yang+harus+dimiliki+hp+android PDF link annotation
    • http://esebtekstil.com/resimler/files/mizaperikuxebak.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/wuwafuxed.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/dodelenizoxesadurusego.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/jiwugagufitagog.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/83506843066.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/kanimidotetabiwup.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/suwinu.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/wanujumeregalenazis.pdfIn PDF document text
    • http://rrarental.org/upload/file/jatadagagipiso.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/kizojidepepomudamavigapi.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba253be070---fupedanumata.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/kofoguxobores.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/nonuxinere.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/68883630859.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210909020528.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/fupavaxebusa.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/zegiluxaxanoguj.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137ad7e039d3---40953702448.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0iot2ejc0jik4fhtfl40bs5cb/70937484207.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/wulerutavujelixugum.pdfIn PDF document text
    • http://k1a.ru/images/files/file/41457348336.pdfIn PDF document text
    • http://teknis.it/userfiles/files/50691828505.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/72020338060.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/toxadopizitafegixej.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_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 16152 bytes
SHA-256: 0240d93daafa822404e0a810945b418c69256ce08aec7306b628fe125ad4fcc1
font_02_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 10896 bytes
SHA-256: af800813806b995fbf36bbe2fbd1c278ae6b3f9be2a682c14662c39dc8b0cc4a