Malicious PDF — malware analysis report

Static analysis result for SHA-256 61361797028e510b…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 03:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4feff6f7bb7f9e7ef5eb7cc684c4b0a6 SHA-1: 949fb964bd01f3aa83e0e8acee62b3e73ced289f SHA-256: 61361797028e510b309af30bb4aeeafacadb504026eae334b587692eeeb3cd24
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://nvsrolko.org/ckfinder/userfiles/files/vubuvog.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/59294b5b949a121c1efad62a773e244d/pukipag.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/fejoxagenuzugisabodogumiv.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/55459296627.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/81460133476.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/16234163061400336792.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/kjrch0acn4nuss04juqfab09r0/jufidiwipesajafefovilan.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8508967302---kurim.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/e5iteo443tf40jn7m11jtvtmnf/jojoxofavusa.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/fuvodojopevez.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/zavofemi.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/1515297613.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/zojarik.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/31592058837.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210717_0A0493A669A55E9D.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/mirefajatiruja.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/17780806279.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68e7aa6a24---xulofomepitavusilomelivav.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f026e76edc---jinusalonapekipifi.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/12172972006.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/bavitimuwi.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/56721885307.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/17965367866.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c16ae8b5a9---95057768537.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/bupamaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=2005+bmw+x5+manual+transmission+for+salePDF 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_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 18032 bytes
SHA-256: 969051d1fc6ca1e59e5041186d3e825aaba391fc2d88cef82e0ab6777636ca42
font_01_sfnt_off0001077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077A 11084 bytes
SHA-256: f48a2d658af9777192e19bb36be9920951756f6fd2ce4fafa73c13b68f9868e9
font_02_sfnt_off00012172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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