Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba2f994329cccd4…

MALICIOUS

PDF

94.9 KB Created: 2021-06-28 11:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 77c2c9d24c9028ec101c2c7a2ffdf006 SHA-1: f3a6124865b50a29f2f628a5fe0f5d32d4444f5d SHA-256: 9ba2f994329cccd4be6c9ddc05ebd583437bb8758700748f9b4d6e6080450e2c
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://laborke.ru/uplcv?utm_term=what+to+call+a+girl+you+like PDF link annotation
    • http://st03.it/userfiles/files/81783666185.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ee270de7431271950a55cd17b08957d5/zovotigilalutukovatefew.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/7675402a91fd0fa842ef0ef329e6043f/51963981430.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608284400b125---nuwowoxokapigaja.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/wawapenujigavalilikonup.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/t5fejmnu2g104l29k3iq2hu65t/92286925396.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/jopudepepiwokuzikokub.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/wuwejevegegelekosaxigik.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ba1e6fb7d7e73e6101d2c8d122fe9fc6/wopigowupixuma.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/vovojenulanapisadekeb.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c74095f7---1920399871.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/6ffb6f9c59210ab0f82cadcc87997bc6/32034381163.pdfIn PDF document text
    • http://temple.mo/userfiles/file/rukibutisisuxonujitetumib.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/bexusofivove.pdfIn PDF document text
    • http://zuche0551.com/upload/file/gusilusimevowunib.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a099a06f9ef---nemageba.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/72050266077.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/e3o5remsvk4c98ijplisp170dc/zasatofituzokovuwizik.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/35850937272.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/91179335d79a7c6925bfedb1f7ff146e/jopoturamajapus.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/vuwetakijif.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/11f1bf3eb1bd4a824e43968cfba72b3f/96450261389.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 16272 bytes
SHA-256: 000fd75fdf9ffcfbe02144012871a802f7a857ab0214fd7c4e4470a5a3b44d4a
font_02_sfnt_off00012588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 17860 bytes
SHA-256: b74ac332ca1473d654c3333c44842581c147cf82eba03e250845f8ed39be3275
font_03_sfnt_off00015451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15451 10536 bytes
SHA-256: ab94525e2b7549a8d616539d3bce847c11879709cce7fd6e01514926d78ae9f8

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