Malicious PDF — malware analysis report

Static analysis result for SHA-256 065e0009d737279e…

MALICIOUS

PDF

82.4 KB Created: 2021-08-30 18:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b3b94566914a2ff2bcd7f7d57abb3b0a SHA-1: 2b0cdc5b2da6e9d31cbe66dcc6c2d6ea6596ac3e SHA-256: 065e0009d737279e30f2bc7b386d4bb6579a1bb70982f10810e672ffa2d89a91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to other PDFs hosted on compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://masihpt2.com/contents//files/ridurutip.pdf In PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d3fe237d2ba6822cd9a182d952c21536/moruworonomuz.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/jurupevuwigekok.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/113e53f00b7602e730c3bd8415a8dd5b/36350971947.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/lesupelefedojasojemufaz.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a224342d598---8577399349.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/fitodij.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/vufarud.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/23607005274.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23b299310---43307026404.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/3466516286.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/45f4a725c37a8ff4192124f71555f71a/17550251877.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/de44bef6416e2402e67fc5c5b399e583/defilari.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/cedfb036de9c1d5e6b86ae84d7e5ef6a/58578481585.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab92d2bbcf7---muzimedig.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/61500122398.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/guvofalim.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2ee3928372a36ea4efda104b1d2f0ca/2590109614.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6adde430b7---78364185951.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/25747596704.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fe388de7625---dapugagonevibovemozegu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f20c51acfa---41281006989.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/lilasabaj.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/rususenuferelewol.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e0dd92f61---zukib.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d8d8efef44feeb010d0982d7ade26313/wosisatafafezogi.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/81969229279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=3x3+system+of+equations+solverPDF 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_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 10976 bytes
SHA-256: 979c4fe0170ee4307361e5b32bfcc34f87aa3836b1874bd65ca39f52bc0af8d3
font_01_sfnt_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 18112 bytes
SHA-256: b8aa4c31701ea026164d550b8851fee44439653fa094822ac65e4754d8af23af
font_02_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1