Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7110d5b9a5abcb…

MALICIOUS

PDF

73.4 KB Created: 2021-09-24 19:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 702aebd6c5ee019bfc8f2280db5186d7 SHA-1: 1dd9fabda7f2e1f4bb3c2200dfaee014f82dac13 SHA-256: 9c7110d5b9a5abcbf13d63f842ebd8663eb0517185a3993ac2767d47cca07e8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on different hosts, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studiotecnicomancini.eu/userfiles/files/66725388763.pdf In PDF document text
    • http://henskeschildersbedrijf.nl/upload/nogadebimosanenijudexuw.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/segakemobinugin.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/56218105080.pdfIn PDF document text
    • http://precisao.org/files/files/84682758717.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/famulironugatiza.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/xibop.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/migame.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/213710560768f68a56212bcc1c005235/14851539481.pdfIn PDF document text
    • http://nfc.soo.jp/file/59637098170.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/30772518719.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/3345006592.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/51208005259.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161337ab80bd4f---52549776322.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/94952034277.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/besegigezamop.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/013njv1510depd1rrvcenia024/85617272107.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/kenopenulonuzewelovapo.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/malujogepob.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/70721035390.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/b632678a996dfafc4bbc45384f67338b/zepimagupawaruxorobagun.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/24885489675.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16149210c7afbd---84524728352.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/85326377240.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161447913c4430---6772545697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=free+1080p+video+converterPDF 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_off0000b9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CF 17728 bytes
SHA-256: a3448d22dbc297c0df4501aca6cad0d6427947575676f11e23b27a5d9ac5a7f1
font_01_sfnt_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 10556 bytes
SHA-256: 22ea37f80b28593066e53449be97c8f85e3fc91329802009c843b3e5d59f1317
font_02_sfnt_off00010014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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