Malicious PDF — malware analysis report

Static analysis result for SHA-256 d829d1eb42df2d96…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 21:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 30b78fb81865e9bf4e8a5bda0374f7b9 SHA-1: 4adb5fb2d4771ecc634d26a92b534a55b8e4c577 SHA-256: d829d1eb42df2d968459bea0cce5bd817134629a25c88058206a21b7bc657cc1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable hosting and are part of a link farm designed to trick users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead the user to a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=prince+of+persia+warrior+within+android+game+free+download+apk PDF link annotation
    • http://melly-incendie.fr/img_db/63991246802.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/54914894409.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/pigodapiw.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/fesopojesewimoketa.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161334ad477712---xafesafazusare.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f52c921d63c23145f43fbf980a79d2f4/dopajadetifaxeti.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/rovazozimuvavupomixego.pdfIn PDF document text
    • http://midospa.com/upload/files/witixobefutipuxefipaji.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/pigojanegep.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/zobegavugimed.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/86633822402.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/weramaxosek.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/28405948575.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/bagujugivomuga.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/6019563445.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/59815735901.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/29334651433.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/33828556802.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/01/jufagomafowapowukaf.pdfIn PDF document text
    • http://sb-78.ru/files/file/10846230737.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/giruf.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_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 18128 bytes
SHA-256: 8685926c6f7abb42bdaa9dd7c1cb368c45e5edc207880ee7129606b11aa1e915
font_01_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12499 11244 bytes
SHA-256: 3a12cef10db3641431d64877925b1cf16637401f4934f4edc6e79efb6bae8ee5

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