Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe3581c42c9002d…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 13:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d17e76d0ba4ebf53940761136a5e3f26 SHA-1: eaaf90d9dc4338552b2db0b065dae717c4524bf1 SHA-256: bbe3581c42c9002ddc62f713dab8217882f2dea60e1d3792f2ad68ca993b0737
176 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. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites hosting further malicious PDFs. The presence of embedded URLs and the nature of the heuristics suggest a phishing or social engineering attack, likely aiming to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc4a2a7bfa---newupuki.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/83cbd1fda1765ea6c10d691e1412751e/wosisogesesixofa.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a909315d19b---doxulegawixitazesufo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39fe4210c---vubagabavutowigakapasorod.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/d057bfed0d69f4f92df17d318ded2c68/49247501072.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/e6093e65ae04e9bb7348a9826b8c6e90/97540229364.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/55025065588.pdfIn PDF document text
    • http://bronia.org/userfiles/file/refezipovewezepurekal.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/tunakefarobu.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/jazewosaf.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/fizuwutibuxirafel.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/342b6b34212938b32a4cb2bc7dec2f27/pelofalojivik.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d573b28b02---93577317980.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31fb2abaa5---66017833991.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094995b21f49---mulupevukam.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7a49641d5286cdd622f9a3f2c2b1cbbc/pulefedijega.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/15274050320.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///44083305494.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b75ad1f4---43530529848.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/13422686963.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/metepo.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5f570956b---63875578963.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/69416103557.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/wotutepor.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2d4a50449786611c61c3ce8410c9bc5f/zinejukor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=assessing+and+controlling+manual+handling+riskPDF 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

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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 16368 bytes
SHA-256: 95019e3469af7210780130b94d59b8b1d114f0a548fb79e79bcd35b60071af59
font_01_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 10988 bytes
SHA-256: eecd8c975d194de38e5b800ec03fbaee09b0793408b01ec167581cb2ceb76265
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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