Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0710293e4df2aa0…

MALICIOUS

PDF

83.6 KB Created: 2021-08-06 20:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eabd2706fe3248aec185dd1058d2bd83 SHA-1: 0b83d53855da8f74bc50d42d11a086bb42912a12 SHA-256: f0710293e4df2aa0c1be62a3df85248734793650629258cc40189a1b89aa97a7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF's structure and embedded links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://drafthe.ru/uplcv?utm_term=himno+al+maestro+ecuatoriano+letra+y+musica PDF link annotation
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a0e3d122672b53dbc85d7e3630054104/88675342359.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/suxudow.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/16784628029.pdfIn PDF document text
    • http://favorit.pl/userfiles/file/rawexaxojutolemudodul.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/gevokapiwapazozinirenif.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610795efa344d---wiwodemekibasujuses.pdfIn PDF document text
    • http://keitbg.com/images/files/xevuvukijobajizo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1610bfe6712dea---gutexaxodu.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/814eac14803a620e21430a4901cd946b/sufawaxupepikexalod.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c2a76cef5a2496f34737da40a9d5bb60/98756065955.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47936dc3c---vodelomirinonorate.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/58008021288.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752ab209904---53852713005.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607909125a0fc---pezijevipajejo.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de01846c288---tusajonofopesomegexi.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/89336309248.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/29884448196.pdfIn PDF document text
    • http://labonscafe.com/userfiles/73094582848.pdfIn PDF document text
    • https://digireg.com/upload/21181881060.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d628841d5---xiwuponesek.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/zujufekajomenufud.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d720e113e---9981089551.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/ritavok.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_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 10596 bytes
SHA-256: aca2385d46624ae4e3b859436f83e342a9bd4c9e04038c90d28e4c22feb392dc
font_02_sfnt_off000112a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 17964 bytes
SHA-256: 9717ec1fb667595bcd25bc4dd0391fd0b976501e23bd7ea73d30bcacb49d6e3c

Open this report in the interactive analyzer, or submit your own file for analysis.