Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bc54f938222753…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 21:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3e949d727656303e4c1148195c1b96a7 SHA-1: d3acb9c0a6b05324ecb623727ce9a44316dee17b SHA-256: c0bc54f9382227536be674fa07117e32ea4e6804b27a7a8b2553b0c4c8186d27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users to phishing sites or download further malware. The presence of external URIs and link farm characteristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb63d40b33d---3825316984.pdf In PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161218c629cb80---dedez.pdfIn PDF document text
    • https://aksusu.com/upload/files/94764404909.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160867597bb228---55165127431.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/4a292137e5db9b6676a280d91c90dd7b/69406995462.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/raioaq0b3dkj2fa72u3utnb7pp/jebufazaladelaregutolen.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/30162029099.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/cb8627100b21b509d4fb5aa803087ad4/zanupexukenewa.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/78142895486.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2edab5bd6---vufidep.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/45249711395.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070d8ce72cbf---49040701331.pdfIn PDF document text
    • http://mutitar.com/user_img/files/pofajegipesavix.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2658d12587---togevojaruruguk.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/76395506580.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ce72e0ae9---tilivog.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/66547971657.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161182c27deda2---nitolukizepugiwulad.pdfIn PDF document text
    • http://siembra.me/uploads/files/6197392103.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/70689024617.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/926392bd5cd9d85faeb4eeaee2346268/40908680549.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/57044408110.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/19801383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=123movies+the+amazing+spider+man+2PDF 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_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 19592 bytes
SHA-256: b3760524eb9c0a793bcc5ccf54783ee422f1ba2045aa11682a6bf7df87108cd4
font_01_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 11168 bytes
SHA-256: 81458856b763a7e51dcc63d223ccfe5afa2a1ac80659c501f675478d75bacee6
font_02_sfnt_off00012f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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