Malicious PDF — malware analysis report

Static analysis result for SHA-256 e844828462388ce2…

MALICIOUS

PDF

72.2 KB Created: 2021-09-12 05:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 126b6e252c4ead8eb4e13cd1e5b80d08 SHA-1: d589349a2d3e1deebf4fe6d00adcd93922cf5c5e SHA-256: e844828462388ce276334d6fa301e24424cc1809c3bc2267a4f534efcb9a41c7
146 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. Several links point to IP addresses or disposable hosting, suggesting a phishing or credential harvesting attempt. The document's structure and link farm heuristic indicate it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://pn-tech.net/userData/board/file/30244221137.pdf In PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/65861070570.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/kizojidepepomudamavigapi.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/42088312739.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/gugitetifudawexovugok.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/78982644022.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210905_114404.pdfPDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4e261fa46---zawitoz.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/18330629106.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/tafinobawuxukarev.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/2526109551.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630799231/files/nagesudijanavofexox.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/wolavinotiw.pdfIn PDF document text
    • https://seerupit.dk/assens/file/45892380814.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/47847317371.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/ziwapovuzurivew.pdfIn PDF document text
    • http://synhbio.com/upload/files/98627144389.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/43864874498.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/62584281695.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/33193144900.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/8378230559.pdfIn PDF document text
    • http://fitviewer.info/files/file/geripudagorowuboxalu.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/70771227252.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/mitetefeno.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/42334101170.pdfIn PDF document text
    • https://baongochoa.com/upload/file/beronoxarojokevesovasov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=electron+configuration+chart+answersPDF link annotation
    • 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_off0000b9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F8 15364 bytes
SHA-256: cd19b3ca884119a99f438d1c2cc1edec62f5da78c4e5ad988a6f3f02d5ffcb66
font_01_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 10784 bytes
SHA-256: 17758e4ceba9c986e39263d27e6434dacdebb88113308492ce10561f737f3e54