Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e09f7b1b6a23312…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 05:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3011ad485d82aeb93a2a83b49984c24f SHA-1: d3d52aaf13b8d092b1965b71174120ee5cc219ab SHA-256: 0e09f7b1b6a2331205717c904448c6dfe3803d74452ae70554e92178c39d4cd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs pointing to external sites, some hosted on compromised or disposable domains. The primary goal appears to be directing users to potentially malicious content or phishing pages.

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 http://muzycznescyzoryki.pl/userfiles/file/waxarevu.pdf In PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210714_A4D870471F052B00.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0757bfe7---40296700174.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d84a4be52709c4e8120ddea18a75856d/16018247433.pdfIn PDF document text
    • https://agenziadiviaggiocagliari.it/file/rujipuligigazedudobel.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/54587537282.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a4395876c---35031964250.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/bojidik.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/28489981264.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5ffd889b1693489d71bb660d7d5c98a7/25640209909.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d41670cb2---fubekexe.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec8f77533---selada.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/limijepawazabi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/abvao8201t7vo65fg2at0lic07/pesibotudonewan.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210728012631.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/37972788990.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632304be8d---zizomutelimuzemugipiw.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/73949659525.pdfIn PDF document text
    • https://chptravel.ir/data/file/94012578522.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f86b445a535---kalutirobojuludumizikiw.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/vivonagexa.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/bt3o7ij25u9gol2n26nqtpcpds/niwosatu.pdfIn PDF document text
    • https://afayl.com/userfiles/file/tusiferutiteridurivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=weider+8510+home+gym+exercise+chartPDF link annotation
    • http://www.flickr.com/photos/mnfiraq/In 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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 16440 bytes
SHA-256: 8a984fbeb9d24239c6609b35d50db0f7a66e1d7661f15ddea1ef0e36865b9959
font_01_sfnt_off00011430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11430 11392 bytes
SHA-256: 8c18bd422589175ffa08565b0a552277f62f0bc84a14f4a086fe67bf9f65f120
font_02_sfnt_off00012f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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