Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a975138f6500828…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 22:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 64ae259b0da06786725e594353596f39 SHA-1: 26392a40bc4b90a8e1dc8b4f391f7c518d70dd21 SHA-256: 7a975138f6500828ede75f3a0b2eeb20d68649c21a580da5c8d9b4fe649098cb
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous suspicious URLs suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee93c7067d---xidixarepepakubifasuzotix.pdf In PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75ac0c2b71---44054469008.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2533fcdc---49074032963.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/55111954739.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160997b09de842---52333881281.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/23551063150.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e99a34c2a---vogezejenizasabevudopa.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16096307464ce5---23019419480.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508223135.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b175615146f---guzoged.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160886ddeea91d---nowedarenugemexunikudu.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/63896745123.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/eba6188bb331c1625ded3ba7c5f5baf2/betavujuposo.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/9utk7702j1d3k0nglm0lhft4e7/kewuzorutuzujoxim.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc3c53df0---sujikazexodogex.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/53924790898.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d4af21a0d---majuzovokimipubomov.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16070a71f258e3---29344605436.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c6d21a1f8296bf25a087bbf459140cf9/67630643792.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/bonemimodimawanupitubari.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/vodagixoxes.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/8pk2ag95mi0oekbkki1onk1295/labewusopulakipididiniw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=under+the+never+sky+by+veronica+rossiPDF 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_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 17544 bytes
SHA-256: 1b8b64d86aca9f047de5bd8b4f8a136cb95f440ed4a59c52a92720f40e242683
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 10840 bytes
SHA-256: 180d83d9baae3876e5b88a331a5c189e86454b4f8d862835497c565d48d70699
font_02_sfnt_off00013984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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