Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c9fabdae358e95…

MALICIOUS

PDF

93.5 KB Created: 2021-09-10 10:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e920a212584011c85dd375359311989 SHA-1: ef76f6beb725dc5cf722aa58fd31b15cc289e68d SHA-256: d1c9fabdae358e958993a5a9706a58d9c80cda3ccf461a93d5938018d6707446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs and a link farm heuristic points towards an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://nitecoreromania.ro/files/file/79696223382.pdf In PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/bokebabokuxokawojoxaxupix.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/zusagibiwake.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/58853854765.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/93961907013.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161389564d5258---dadekexonu.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/79592274739.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/48184372751.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/1513181718.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/depepuwipesoxox.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c09c7a03f---rarunepedipurifeda.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/51387138389.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/h7n8mv03gfh4q36fub4bu5paim/lixinuwevipapikatilamak.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/55894368523.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/50100180690.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/bogufaruxabotud.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b06324c2bf---minoronod.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/83310378502.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9195d9fe4---mupikonuzevujolupuja.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/41100247542.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/18362433791.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/85705629288.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/nijumi.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/97447661564.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/3189878151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+amazing+spiderman+3+full+moviePDF 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_off000109cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 11208 bytes
SHA-256: 2e21e60f7197599400c9f5f469c29f3b664ce28bd3a9517d7da5c22c0a513856
font_01_sfnt_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 17228 bytes
SHA-256: 4306643307afed9ad47af4c27aef60e42fe67a668ecf52a77561b0e1783f9da4
font_02_sfnt_off00015055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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