Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd87e29a50d1eb21…

MALICIOUS

PDF

88.0 KB Created: 2021-07-07 16:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9dabc3ceb760cc1c1be2dfaebe49a346 SHA-1: 9b1192101a6c98e7e9b608219b2916ab0c60a240 SHA-256: bd87e29a50d1eb21cba4d8f86e9998896ad64cd20f965e915439dfe39ff97f37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/35b7c3b926d8f414fb09f7652d15f5a7/sazofemulewixubinituraji.pdf In PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/u9qu615epfm7ee6dijmrm785ck/59227522770.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4cdd8c25b---63247977932.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc680b1fd4---luxuduxufetokekepuv.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/d9784c1cd49555b6582b0fc5e4293795/75755160730.pdfIn PDF document text
    • http://ghgunclub.com/clients/f/f3/f3036db30fa8ed97f94f648fc77c1040/File/89382148778.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/wavagetufisapikudideta.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/pufove.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/89f5950da8f23068a7c968341b577a63/65782753558.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/rejivofisoni.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/8060572522.pdfIn PDF document text
    • http://www.bandungmesin.com/file/67856719572.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/97364801574.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/vg093f4mtdhihg46od9d7bi3b9/97934045067.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d577028bbb---xubupajoj.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/belitozadigol.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7122d27371fe2fc663456db0d9cf352a/49406418205.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/91b521766daeed8ae95fa6296e843979/4280556243.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/72879578181.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/15429111525.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a6e913d17ac1df91d2092d371a6a2308/fexabapakipikavug.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c888b26b422---ravivitebeburuxulov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=direction+of+force+on+current+carrying+conductor+in+magnetic+fieldPDF 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_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 10868 bytes
SHA-256: 60dd862dad456eccfbc47f83aa60b5f60b91a206d09bbe50ef6b9fdab006d48b
font_01_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 17592 bytes
SHA-256: 0e8f2e1a852fc0cb02c481d153dc2f9ebf43f0db84ff450b3077e6e7c4399108
font_02_sfnt_off00013a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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