Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f534c2407f81dac…

MALICIOUS

PDF

75.0 KB Created: 2021-07-17 22:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b67613d77ff341d2f816e99486cd7da7 SHA-1: f4e2d07f252d8931046f056149bd81245c3f6b57 SHA-256: 0f534c2407f81dac68bd3e0ac98ed7bfc8ac46ba2fb3fabbf18e2c2f6303bcd9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pasarantogel.com/contents//files/26442010897.pdf In PDF document text
    • http://hurtmar.pl/Upload/file/32645064926.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/94232971160.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2f9e07149---pezafoji.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/18791218273.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/lotek.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/48518832309.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/jiripeku.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607430550d5ad---jasezunoso.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0f4f801d3---deponujeguba.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/28907758274.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/fc2cb638b7a08177189e3c1df4d2d31c/kakuriboboko.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/a47f05ad2043bcfa03531c937c2b5cfb/11821470519.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/3618101433.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/55476082117.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/tokinisiwe.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/92938315276.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfb5b3f42d---94221463246.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/kagiri.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/26957529036.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/4c2e2e0f784dcfa029a7304615f35e0e/mibotug.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607510a841041---1849604196.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202176521173050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=amherst+arrest+recordsPDF 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_off0000c282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC282 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 17136 bytes
SHA-256: 20bc46bae81b57fe042f6663453a35af0682d1e94cea5f7cad5aab40a100e0b6
font_02_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 10372 bytes
SHA-256: 35ffbdb30573a58e6407447211f9cf5a76b01673ff9beeab6e1f22419fd8472d

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