Malicious PDF — malware analysis report

Static analysis result for SHA-256 340fff46e549323a…

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 02:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: adc339e5f0319f7712a8a063eb02d3d4 SHA-1: 6901e1c3bbe919e7ddc472a0ee5b6c297c913677 SHA-256: 340fff46e549323ae9d62db4b0b3d0d120c9e5af8a316a14e7cb1a111140e37f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised or disposable hosting sites. These links likely serve to redirect users to malicious content or phishing pages, making the document a potential vector for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://angelcabrera.com/FCKfiles/file/25562552419.pdf In PDF document text
    • https://suma.ca/upload/editor/file/46859582993.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a0a70c7a---68966724632.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/tusugoragime.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608efad07948c---93047040283.pdfIn PDF document text
    • http://hidropro.hu/upload/joziwibunegimi.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce73b7tmchd2ajg88jce5s8li1/rewegirugefowuxitegubusuj.pdfIn PDF document text
    • https://mmszke.hu/files/file/gurakega.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/71130916853.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/45436799539.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee575f1c0e9---39245088104.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/4885646649.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/53ef8a0354d453a6022ac49dc689f87c/45853836398.pdfIn PDF document text
    • https://lasanisports.com/files/wotuwiguxasofi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/3987b2557a5271cb88d2a9f254a2ee04/rabikadijamutumotozejoru.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/5cd4cea2fe6654e3bca5ba00975fa838/52727105050.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d9b07ccb---zilikuzuwuniloxugi.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021082121523773499.pdfIn PDF document text
    • http://geodez.com/pliki/file/68516075399.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/61876087762.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0b7b4049412bf91e6d0b74d7f6180c52/38391502666.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/4c66cbe8460183748ab8601dde946c12/kiwejo.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/kojodobefijizifapawawijeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=rotation+page+fichier+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_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 10732 bytes
SHA-256: bf296261a61f93b1a5fcd729878e4f988d30a5af18293a81cd66926e26001727
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 18432 bytes
SHA-256: c7fa84e142b876b91dc124426d334a13381cc72abb6d7a632ec4d4acb03b00f1

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