Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eee4a4fc4b40636…

MALICIOUS

PDF

89.5 KB Created: 2021-08-11 15:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ddf9c96a185ea64c40f5b9f07689edfe SHA-1: a2f2c34a8c1d44877dc6014da0487531d0dd3887 SHA-256: 0eee4a4fc4b40636a51ac47f6fc54d956304f4970b42601e3854429778934533
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. The 'ClickFix' heuristic indicates the document attempts social engineering by instructing the user to execute a command, likely to download a secondary payload from one of the numerous embedded URLs. No scripts were extracted, but the overall structure and heuristics point to a malicious intent to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://inwebjor.ru/uplcv?utm_term=internet+explorer+cache+l%C3%B6schen+win+10 PDF link annotation
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/69904777276.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a7fd96921df0e28ed10ca14d2a865d85/jejujuxo.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9e2be080---36854269341.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/vamanirozofetivurufeto.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37980f08b6---38701152231.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b18b4cf670---87441052103.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4bb8832e---retotipe.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/jomisolunamabokutozododob.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080922fd29e3---43375448727.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/diwuxasu.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/e780a923e1ac9437c4bf987bc67e9543/zukulukamivowogazoba.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/tuzon.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e04d30e5f70745eca7540219d5f3d315/tefoj.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d932fb440c8a5419f9db4a883a810970/fizazozanekuxebapi.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a7dd1f0e8a10df5f80ef062f4ce769a0/62635921598.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/70931875075.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/b7f81f319d0c779d77e230b502ba1ff2/49827537012.pdfIn PDF document text
    • http://artside.org/data/temp/file/74271277217.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2bbf33405---kaxage.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/37636113264.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/fogusikenuxix.pdfIn PDF document text
    • http://cartopack.com/Images/file/53640475468.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_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 18016 bytes
SHA-256: 2aad2ffd34b3a2580720a04150174a7f9b67d23178b58c65392f2d21611959c2
font_02_sfnt_off00013d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D00 11000 bytes
SHA-256: de9bfef2be196e73fb19647ae3cf54deba47fc1ae6dc06dcb206a520936fe738

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