Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce2329192805048…

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 15:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d7ef0630a0692d56ec71b85a8352eb80 SHA-1: 3b583b71b08709b0433a3a5da540fd48f6cb7f1c SHA-256: 2ce2329192805048d9ae709139578ef8355659b72f3a5b53ff7331ef6ecbeb8f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites or disposable domains. The primary goal appears to be SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://sunrise-photon.com/upfiles/editor/files/pikegozepatemuvapabudizi.pdf In PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a5868f80e9545fa0a74eb3900b0f0e7/ronajegabamiratexijakes.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/ruziladola.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/maxonupemivevidewuvi.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/48868529369.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/6d631dab6d30744cab29bd610a6655b0/7389570162.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161267333641d2---voxubenimapufemevop.pdfIn PDF document text
    • http://charivne.info/images/file/sitirapewuso.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/wawuranapunigerox.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/teduluzisurolafa.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/6157752115.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/0f3vn6m8f5t33kt43gec9c92sn/6166049846.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/togedanozuvoxipaw.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608034456d1cc---lalobuxiwetikoxaloxabopi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082062e868b5---fifizosifat.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160856f409eaa5---diwojenabijesatavowudul.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2370885a6d97a01faa972501144e1337/mabogasagilamiluzutibu.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd4552c7e5---juwilir.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/tipafurukuxidemumelagonu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2879351e16---34776962859.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/9de14fba6d6da6e33a04bd256bd9c02a/rivelotomalopoj.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/f3dc135d63692129981658af6616157b/nilapenaketeboji.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/nuzikuwuduvaponajutabefeb.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/81734930721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=electron+in+action+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_01_sfnt_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 10428 bytes
SHA-256: da22d744de9613d8166ec5bca182c6e0abc533a5b12313d36ef80c716ce78923
font_02_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 18316 bytes
SHA-256: 59ff16069e73b8d6997270f34550ae6c3b0ce6206cbd7500b30b96c57f6a6ee4

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