Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ab4131b20e55fb…

MALICIOUS

PDF

84.6 KB Created: 2021-07-05 04:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3b8c09b21d06598f5447e28ccbea5ba6 SHA-1: 2c413e0e26a7f20b1ae94c2b4b24a7b6e6ea9dde SHA-256: 06ab4131b20e55fb93ee8d5548c1a806625cae78e36bb5ed78ccd155c35ffd93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting it may contain embedded scripts or exploit code, though no specific script content was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=used+for+sharpening+blades PDF link annotation
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/feaddde350a16e26a1571275cb3b9b47/40501444017.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1b1854c8263398efebf950fc3da5c980/25096838288.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/598d3900b046a495c29045f523c713da/32510559648.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/11959626519.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/fipikadepirasuloxewu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/fd231c497b0dd161706cfe3ad82effc9/mesugori.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/98863724041.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/lefakimazemif.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/duvititabarejixoriro.pdfIn PDF document text
    • https://datawire.gr/files/files/33133889481.pdfIn PDF document text
    • https://datajournonepal.org/files/77174726341.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/46605897495.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0nmpk9cdu725u2pl3kmlohmih5/36344876937.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/livazolib.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/lanifebewikad.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160822bf166317---63243909104.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabe108be6e---vesibelaxorilojugofo.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/d17151deaeb7b5cb347cdbdd326c3beb/rifazogowetukidam.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095078807b63---31905512169.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16099c8c7e8ff5---16763103796.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a328b5d44---kazawujisovizebetizitije.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nuboxijavomuvevek.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160821288ebbfb---8530769788.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/nejujalawezobatureder.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c02269f741---21321782595.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_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 10824 bytes
SHA-256: 34c427589ee442801c22432c3a6826a34956321384d0698dff261510811ed9ac
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 17248 bytes
SHA-256: 5036f37e0a7eedc05570081fd8d8164aad91a6494ad16ad792c50e09a622e9d1
font_02_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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