Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebd709dd7484ff2…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 06:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2dca64cd574254ca7dd6a5cb683d2154 SHA-1: 8debdcd1869db7c492aad88b75aec9ba7bd649d3 SHA-256: 7ebd709dd7484ff28ae47fe1391f2c48725105ac0ce68497159ffb080f3f3479
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains. These links likely serve as a lure to download malware, as suggested by the 'driver booster 6.4 download' UTM term found in one URL. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://crewmak.ru/uplcv?utm_term=driver+booster+6.4+download PDF link annotation
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab83d4f274c---pimawezutevefo.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/xanox.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/l5f1hp2meu7r2l9jbuc6nrj160/gefapobuxugazit.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/73903177795.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/854371ed81d4507fd2cb675c13613d24/velak.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/31507468756.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/21204748254.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/668fff0f65ece952661c600ee3e7ec0a/mewozetigezawidavekakafu.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f085ed0bdc---puzezavavefe.pdfIn PDF document text
    • http://iphysiology.ru/upload/75424489551.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-13/20210513233716105897.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/30b5f98815f478d7c2d2ccd044576693/fukoj.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a42108a0c---ganakabaxi.pdfIn PDF document text
    • http://m2m2design.com/userfiles/poroguxomozupakatolo.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d1decbb6d---dajasevada.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/wovunifalodebikezusulugak.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb99e96bb0---sarikito.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/22124129447.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7e6d2165e---zofopalenugofapaboka.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/942666eb2e46f1919c940cbb0616abee/17001171775.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/9ml8sfgbnp9korbv4427c0jpff/paroma.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/meferob.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/wakinexikejulen.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c424aae354---31570482728.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607212ef9366c---65931990703.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be755c147e7---sezikiviwepaxage.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 10844 bytes
SHA-256: b791581c93288365697f1aca093dde375ded968d4b5f56dfb4c058e588637b46
font_01_sfnt_off000105a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 16496 bytes
SHA-256: 7d2453e58049140513282b0e4323061723732fd34d571ec0cffa6ce40128603f
font_02_sfnt_off00013066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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