Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad801b06083c3f9e…

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 21:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 53309781dc2c50ec8235e1a7e3b4a802 SHA-1: eddc474e840da048cb8078e00e19ad3544875618 SHA-256: ad801b06083c3f9ece21c2dad989c69397c72966eaee52757a309d5d22d18f3a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress sites and IP addresses hosting further malicious PDFs. The presence of embedded URLs and the overall structure suggest it's designed to facilitate the download of a second-stage payload, likely a phishing document or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pemaboutiquehotel.com/assets/userfiles/files/renomavalokiwoko.pdf In PDF document text
    • http://www.anjhimayath.com/upload/file/66972372603.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/27786087511.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/xofaxisanolalinotuv.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f80e2a55e80---puzekujulowetamabe.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a83e3caa---90794819911.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210727015720_3f1gjc.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/27586320987.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/kkge1ojv336ubpbmbbm1tjphp0/19813905632.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/65068565524.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7b0f07b96---18632554777.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/dofugijad.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/fixifolokuverijitofenaje.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/podurufage.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/vexaxolasamenawofadoxev.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/76366424786.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf37674e9---najijonipafutalupi.pdfPDF link annotation
    • https://arch.ua/ckfinder/userfiles/files/20616444031.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vabuzukoxotimugu.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///tavefopagola.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7580c57958---25868258787.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/vuram.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/nivawelupe.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/59811444744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=urdu+novels+in+pdf+free+downloadPDF 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_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 10652 bytes
SHA-256: 996bdd0c28789c9e2d14598b2dfd604ef13252211c3635ab947fb15fdacb6bbd
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 19804 bytes
SHA-256: 1f9828986bd13af63c1537d5e53b907d593596852b06047d154d1d060ca86819
font_02_sfnt_off0001274c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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