Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c3168fd9c33162…

MALICIOUS

PDF

115.3 KB Created: 2021-07-16 08:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f9bf78aee730fbcefacac0dd131fde2f SHA-1: c16449720bd3feab21cb021135bc902cc47126fe SHA-256: d9c3168fd9c33162966be2e9c655414319818bc1c86c61e16ae66a0f355dc0fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are new or changed payment instructions. Numerous embedded URLs point to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pistant.ru/uplcv?utm_term=wv+income+maintenance+manual PDF link annotation
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/bbb298db19043d45548b7bb1e494a47c/pibezawegarimazunufemakib.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/q4hgpqvkg4sdp7egngkv83rp9d/54965960009.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///75275774557.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/birunalipoj.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f7e631aecf8eb8b34e5ccee74d0a2643/gamag.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/4bda4bf63b2cec77766847c585719af7/47638017271.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/suzetagazalivirikevuviba.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af0c8e4ed7---zivife.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084508dcd02a---moxenojofer.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/megivisesupal.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e98c22ab0---31037236670.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071547f2d497---27396999687.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b56228845bf---18142684503.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/77a4bbec363d8a96ec431a17f2d3e64e/buwemidomupomusi.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/zivoxojuxakivopasoxelina.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc2b166e8c---12649883160.pdfIn PDF document text
    • https://egca.fr/userfiles/file/29798840627.pdfIn PDF document text
    • http://cocoal.com/uploads/file/bifikabowekakodowavug.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/28ef50a1186d78c933a1d86a460979aa/8844435797.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/g4qjfbgj0cv4265glvo1lium7r/83424411539.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/51160227365.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/3g1nmfvg62pf32bg031ffhejer/3098124845.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_off000161af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AF 17940 bytes
SHA-256: 77c0400cbb2ba3258faa840a25bd16c41ad4205b79f636c192944583f25f8b0e
font_01_sfnt_off000190ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190EF 10284 bytes
SHA-256: 560598a5d28e1878ef3f30c26a129aaee53bbc9ea1f6e241338ed43150748470
font_02_sfnt_off0001a813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A813 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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