Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde593ac1f77fa97…

MALICIOUS

PDF

75.7 KB Created: 2021-09-08 00:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6f2dc5f61de18dee61808cac9756ee82 SHA-1: deba623afe2713e7b7bbdfc0698b9305eadaa969 SHA-256: dde593ac1f77fa975d048f60a824fe73ff1e0b75c9e4b4e62adfa150684a448f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The document body was unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://bdsvieclam.com/upload/files/71026140446.pdf In PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/kifeso.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5671cn2uj43t95bfpojk7edubj/fabewoverunazabitujudupo.pdfIn PDF document text
    • http://geose.ru/userfiles/file/7965641983.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/24269272298.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/biworogorugijadidad.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tetememofoto.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/zujefe.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/uma1c5bl2bucuc3vsq7l5hu4a1/82162947483.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/katoguxunos.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/betalatevijo.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/0ef5647518d810783ef2a1401e155199/21868601319.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/kirimiloxejetixuribawi.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/19858950293.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/53688436055.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/829019986.pdfIn PDF document text
    • https://mvservice.it/file/46553988302.pdfIn PDF document text
    • http://kgmda.com/upload/files/54210159416.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e534b758fc773f12cc9f786902b8df53/25110546074.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/40232911864.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2e93799a5---vozadefisujolidibat.pdfIn PDF document text
    • http://dzbnf.com/upload/file///xipuxafagilewox.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ccd9aeb002c774e4b746c151f49fadec/pisinibabenanozunevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=breve+catecismo+westminster+pdfPDF 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_off0000c0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D0 10940 bytes
SHA-256: 686c6ca068154895d5ba259882d944f66fa22cb35bd9b4b621a435d72699d48e
font_02_sfnt_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 17956 bytes
SHA-256: 360b7f5ae7adff633e6aaee451aa05d2872da4d6fa23bbec4b137d1062269545

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