Malicious PDF — malware analysis report

Static analysis result for SHA-256 2867fe72ea2a8ecc…

MALICIOUS

PDF

70.9 KB Created: 2021-09-26 01:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 30ec9211763e687c9129bd9fd0629868 SHA-1: 6eea5ff5db789945c9a4854a621069e776d81958 SHA-256: 2867fe72ea2a8ecc21b58dad2bb32014a41a55853b25cb08f9758ba5b50b566f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a link farm detection and a machine learning classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable domains, suggests a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://myxroad.net/upload/userfiles/file///lefefinowebi.pdf In PDF document text
    • https://tomorrowhubs.com/upload/users/files/tubepopewof.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/13408965417.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/21535638791.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/52446294251.pdfIn PDF document text
    • http://budropol.de/Upload/file/34536878352.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/mikidegiladupadefujim.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/xivefaxu.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/susejemanidodojojimuzisu.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/zupedanimamijuzixu.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/jutiwu.pdfIn PDF document text
    • http://rurisnet.org/images/file/88621864718.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210909095536.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/25083348316.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd5a40a46e---fezukekol.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/52046893707.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/15115905878.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f5fce641a1---daken.pdfIn PDF document text
    • https://theurbanthinktank.com/files/kugatumefe.pdfIn PDF document text
    • http://surestegc.org/documentos/file/lekavukazodage.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/97405150998.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/81565584465.pdfIn PDF document text
    • http://dsagco.com/Upload/file/bemer.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/fikokuwoleniduruwutodiza.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/38308484459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=supermarket+mania+2+mod+apkPDF 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_off0000b1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E8 17148 bytes
SHA-256: 15f28f91ee9216497ee23cf05f0669fbb2a629aa07313b727734b84073393e37
font_01_sfnt_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10728 bytes
SHA-256: a3cbde5621658c33ad9b9a3f8a8fe39a34a1325810fc63ddfff8122db51dbb5c