Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9262bd2f6fa868…

MALICIOUS

PDF

86.2 KB Created: 2021-07-10 03:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: da09dca6f52f56c12ac722d0a62b0fb7 SHA-1: eb1543130b23ffa96f9e928c62d0b53ebb88b688 SHA-256: 3a9262bd2f6fa868f77396a2804214dd28430e7365b0d36b00226dab332d5b3b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links pointing to compromised CMS uploads and disposable hosting, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=chapters+hacked+version PDF link annotation
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/i2pdd22uoneloqk1nb3nu5fd71/vugoxozepaw.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/zapepojedojopiraxo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a14e148d6---joxutomevaku.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/3a3a7320da240d8c3e8077f0bb939ae6/fisegotiwip.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/kebopinazel.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/72003356094.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071c35161c30---1928194043.pdfIn PDF document text
    • http://bwc.lt/i/masom.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3eeac5f43---lowopajefopopafijak.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/v4j2gnmfv8cd8la053hpr6ca0i/najukezovovegiru.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/jepulabizorufolufosuzola.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5093855146.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609220017b6f4---85299425393.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/srqm9ocplrrao54vl4ft6fjkt2/27068113130.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcf4ddaeb6---mupujofomefolevi.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8eee5d4d0ecf451a4a8f4e4bf8c83848/35787315712.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff3d61d3ea---xavatidov.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/pvgirf48hcof00jugb1lndqn1h/budowimoxebatobafe.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/97cb08aqs3mffhd6doleccv389/dopinegininemetenewewifex.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/91765774161.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/dgvf29a37qe83mgonndvbiatd5/ribekagejebamibo.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/vepimiv.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/3e7i6p63rbuq89da7ir7rojn3c/saxeno.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 17280 bytes
SHA-256: 1904fb86e717d372dc52701248decfaed479e29699b5a6c9b1c7645748ea742b
font_01_sfnt_off00011b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B15 10752 bytes
SHA-256: a36bc05ca03d4aa8edd1a4ed5ba8dde9197d087f68185c6eb8a5e6b1250915c8
font_02_sfnt_off000133dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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