Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f959b9ec79fd9cf…

MALICIOUS

PDF

75.8 KB Created: 2021-09-18 03:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: da25a6a09a7c26ab5860531b0e6a031e SHA-1: fb9d1396f7f4b6f7360a60b13d9a50de1bc7a008 SHA-256: 9f959b9ec79fd9cf2efc6bfdce92b497ee98dffa5a463d819addcc699ff9b4c8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were directly extracted, the PDF structure and the presence of external links are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://xn--interpeas-r6a.es/upload/files/jupokipokewop.pdf In PDF document text
    • https://lotteppta.com/beta/assets/file/59169794759.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/davav.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/59362786808.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/maxapabunejewarovopedibid.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/sokidotafid.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/92421277128.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109010048294426.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/jotutotuteluzagalasaboki.pdfIn PDF document text
    • http://headrepublic.pl/images/files/8886343092.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/52135111885.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/gawupub.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f611d4147---furugebuturogilor.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/monifolovop.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/88852824881.pdfIn PDF document text
    • http://serting.eu/userfiles/files/89541426378.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/46661413608.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/8136593339.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/jiziz.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/musowarani.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/jutovefave.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/vubav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hogwarts+mystery+cheats+iosPDF 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_off0000c790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC790 10720 bytes
SHA-256: 6298896df328ff75c83678ae07837b9b9ebdce864739199a636b8de131c58070
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16268 bytes
SHA-256: 90f5cf8c0a94aa4ec1bccc75ae5b4ca7b6ae97cd254b7d7478ca60e56e8a9f7d
font_02_sfnt_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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