Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dadec35134a8a3…

MALICIOUS

PDF

136.6 KB Created: 2021-06-28 12:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 469dcedd5766e8be8fbad51b0e8df37c SHA-1: 787ee4c64b2ec3c9f792d338ad08f5b934f459be SHA-256: 48dadec35134a8a363af37fc0347b7b48ef5774187f3dbe8b32849f7d100625d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/17a0c649dba7e1a65c328815370d9b57/26143781644.pdf In PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/rowekilutoxadesizafa.pdfIn PDF document text
    • https://dannysacademy.com/ckfinder/userfiles/files/68619027580.pdfIn PDF document text
    • https://medtek.vn/storage/file/26566259294.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/30480244026.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/nosafusanipululomipob.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/44988059906.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/sv4euegqjlgmgu0qg6afiajgqs/mevojevatijunujom.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160be140e516c3---xifidok.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/e020cc825e16592a8eb07aa4a335d9ba/meniziximufalakifubokoveg.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee0d900185---gesebokabewuled.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/6998524147.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/bubiresadovenina.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725fc401671---kidumenidalu.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5e48d7c4---37991488661.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/23336129919.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/86678632188.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210622170408_6yjlwi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/64672893390.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d10b023b0---kigivodixusiba.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/97ebbd1ce1172afbb9e27f20161353e8/gatetodoj.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/0185eaf0445980b78966e159868630a9/99569239661.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/3ipir7j8mpoakvde0ts13h76qo/genemejawutigu.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/65608616205.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9671d5440---31849766443.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/vabemiwesira.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/998c912b9dd3ed0b28f9c552a3b2544f/6200410212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=tlc+test+questions+answers+ny+2019PDF 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_off0001b1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1B1 11092 bytes
SHA-256: 9fa5f278611ee62b9c9798ff481dec0a2523b57d64b14c830f866f65a4f659f6
font_01_sfnt_off0001cbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBE9 18320 bytes
SHA-256: eff3e988ae3a59ab1de13ed344251c41b993a30452d83f85e58a03f6daddc0fc
font_02_sfnt_off0001fc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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