Malicious PDF — malware analysis report

Static analysis result for SHA-256 1244fdb50fe16ea6…

MALICIOUS

PDF

91.1 KB Created: 2021-08-05 00:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6d003778d4408ef2721fb38ef3bc4eff SHA-1: 02275d6ffdad574b694aa5b3700b9f5decd0c4ef SHA-256: 1244fdb50fe16ea67fee4ccee083fffdd9a34d79e84870c628a1e1fb338ad781
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous URLs pointing to compromised WordPress sites, suggesting it's used to distribute phishing content or further malware. The ClamAV detection of 'Pdf.Phishing.Trojan' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=how+to+present+likert+scale+data PDF link annotation
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/eb04637457d79815fb55d187d2728584/47921515911.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/ddea4221b1f9fe5e29fe64260f1f0d4b/pajevuwu.pdfIn PDF document text
    • https://basisnomor.com/contents//files/badovivodazunulujesulako.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/bubupevebe.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210722_F8F50ED06B447C77.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45a2a764ba---25199162008.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a22768dd5cc4aa4a2b7c2029d6e15596/30440249378.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/senedutomapenabukowag.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81c01df34---79244153368.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073b169835b6---gejagutimokawaxokuworun.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/37990975874.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/9ev1ehqd5ga2nhorrgp2jhm6rm/bojik.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/247248a968e0f9a4588662578118b0c5/pajubisitakeduzov.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/lujupeminotawagirezakenej.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/eecaf319b1a48003ff6732523ffd26f9/73228802030.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/17603475114.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/38715006447.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/25102736772.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/27661514031.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/8191913608.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746be118aa2---rozusasa.pdfIn PDF document text
    • http://steffis-strassladen.de/userfiles/file/fenejujivuril.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_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 18988 bytes
SHA-256: 50f1e74a2af9fda377ff0b48a83dc71e9baafc13e199e2b3540c5df6db21233c
font_01_sfnt_off00012de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FB 10676 bytes
SHA-256: 5c13cf01d0d853a3d90a062ce7f6c0b643cb3aa2abdc6535cf3338c5445e503e

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