Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee690fc148b41a29…

MALICIOUS

PDF

84.4 KB Created: 2021-08-06 04:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cc5f7692eea916d5c17bc65b34f7c63 SHA-1: 9fba072afaa760d06da05cc9496aa3d6e7886def SHA-256: ee690fc148b41a299b5d4e530d55580eda7168da465f7ca67e17ea365e16c3f0
156 Risk Score

Malware Insights

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

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 multiple compromised WordPress upload storage locations. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b7ccfb7f---pugixoratowikipi.pdf In PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160854caee6323---rotowamejozipilosilupol.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/retofozatotugetitadevo.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fcca22df2---41700571412.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/funuj.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/29bc96ec9fca38581a865b761e0ee1fa/43521638552.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/bakowepixiwexexevu.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/niliwuzegaw.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/23493289251.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ab8c6123e---jilef.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/jcmgapdvhh67lsmh38kehsb9k2/20744141253.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/36c44f2c0db8f792538ec7f75cc56f27/41399302706.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f3818e0a---joxigabobogonojexeginem.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3b91349a1eb10a1d59810e725d553d23/71451135590.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/75430996116.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/lebanidujarivoxaga.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/widimezepewizifo.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/cc4f19a54b4551f8da060868439f56be/xoxutaxijuzulafotofuguda.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/tinevebodo.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/47073168128.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/morojup.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210707054355.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/69766566263.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8c582b794065b748d5b8793a7edfebd0/92327617562.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/levokixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+are+10+input+devices+and+their+functionsPDF link annotation
    • 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_off0000e569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 11004 bytes
SHA-256: b4b2125e0f3bd6b3dbdc7df3d5c6f381e7641fa2cde46cea01916834ff7fcd19
font_01_sfnt_off0000fefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 16984 bytes
SHA-256: e680e622ea492e02e2ff394c8c993dd0540c61a660e5a0169b2dab6cd48bcbfc
font_02_sfnt_off00012b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1