Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbd5eddfc120283…

MALICIOUS

PDF

104.1 KB Created: 2021-08-09 06:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 16d60fb209f2a3bdf21890d6df7451d7 SHA-1: 65296b043bd015e405f5739ede981426fc80a172 SHA-256: 0dbd5eddfc120283fa1822b9fa68914c0dbb10269afe75d3e630650b5ef5bd3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://irlanc.ru/uplcv?utm_term=filmywap+punjabi+movies+2019+download+free PDF link annotation
    • http://agama-rc.com/upload/files/90703364400.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/66514040617.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8ab69c78bd347b169c2950087e94e29f/12911295555.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac19f21c1dd---16835281742.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9fddd6bb---fozopinitibodejoxana.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/4bgdp3ampf50utujphtu1og9h6/kemabukesaxafibofagu.pdfIn PDF document text
    • http://smn69.com/clients/866038/File/81654325730.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb5939e9729---9240751366.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/48ujcf9te88du3hjc3i1k64k6d/zurimanizixedovo.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/jegav.pdfIn PDF document text
    • http://berbun.com/user_img/file/53741707241.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daf13c4c0a7---puwimenimotasixexig.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1e04df90df3513e27741d9f0e80b7596/tefarit.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/50749172519.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/98845852060.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161105bfdcd341---musumiwopenosoni.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608bf575505ed---salakokozelikewopelunit.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/zezizomitos.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/gojomitozibimuwuzopiki.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/9sgincpgos7b27034dsiql99fk/49806432614.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/24481088769.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/52765875566.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/7eivt55cnsg662ai37bs9up6ps/migujat.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607536382e394---53507879009.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf3713730a---pijabapewuxubefusave.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 6904 bytes
SHA-256: b87cd90bd0105eeeef6998e164f1371ca66696687c0039b3317d548d81d7b447
font_02_sfnt_off00012245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12245 18760 bytes
SHA-256: 74945c58d2c52a741c9c96127a97aa11b5a3845d0855ddfa4b208aa6a8f1949a
font_03_sfnt_off00015296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15296 11636 bytes
SHA-256: e81b9702a1fc67dcac0afa8034e5a1905bac4eb8d16dce9b093cb208de78e693
font_04_sfnt_off00016e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E0A 20472 bytes
SHA-256: ba3869d475eb1732f50f0b5124c400398312902decd41ae4560950b4b8a8be94

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