Malicious PDF — malware analysis report

Static analysis result for SHA-256 a010bad731b7f82f…

MALICIOUS

PDF

86.3 KB Created: 2021-09-21 04:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 904355a9d56f9bb8cc06299dfe1b4d6a SHA-1: ef70d6736bbc52d9742e11453f684b87c3b71f9b SHA-256: a010bad731b7f82f834ae14ce89fada69d7fd5ca080ef128ea3b60308189598e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to various external URLs, some of which are hosted on compromised CMS platforms or disposable domains. The presence of embedded URLs and the nature of the link farm suggest an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=use+android+phone+as+webcam PDF link annotation
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/majulifitesixilu.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161490a00bfe34---35451456550.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/fipotatufig.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/875411c69b80588d549e9d43884ceea0/5107658666.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/48466007848.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/167790377061439792ac995.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/99709429878.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/vakiwaju.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/70791727194.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/1177571167.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/68587448201.pdfIn PDF document text
    • http://satyamtracparts.com/userfiles/file/giweket.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327550c6a84---xixoxem.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/23807688853.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/novixolozefudewaferix.pdfIn PDF document text
    • https://cmf8.ir/data/file/549693060.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/77975986450.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/34384296645.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/kuwiganomajuworulegu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142915bec270---beribeniwesutujakopi.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0733ad1ad9ff29cf96ca86e3c475cec4/sejani.pdfIn PDF document text
    • https://akvaguru.hu/user/file/xawaweruvejo.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/midawunegokuwavibozi.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/mutidapuf.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_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 18080 bytes
SHA-256: 989f339f0ce8348b781dcbdbaf34f9f969f6984a15058703054829e96b5e9d9a
font_02_sfnt_off0001328a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328A 10868 bytes
SHA-256: b5d02fc6645c5fe50cbf2c148450beeec3d86361d376957a7843130da8573380

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