Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3747e3f1be33d3…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 00:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e0d975519a8827bed956f231eaf0089 SHA-1: 6cf4d684a1d421978682f1913b5ad5876ebdaa6f SHA-256: ce3747e3f1be33d3ddd81b6bd7a26bdb7b0aabc6a2d940576c619bd047b39ee1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The presence of multiple external URIs and a high number of distinct hosts suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://rowerowaszkola.pl/imgturysta/files/8968008145.pdf In PDF document text
    • http://presssimayeshahr.ir/pic/file/xodujiferigavuwopozebiraw.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d66f86343be452726a2aca7fbe809ab3/56200059768.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jl1m1kgujgfui052ij8fgoq5as/piximixeb.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fed4b7c193c---rusewaxexewuj.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/xorazorumoligusum.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/gll54s4gth5pnh2etk64avqc2d/73716231124.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/93214782383.pdfIn PDF document text
    • https://medtek.vn/storage/file/43120232399.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/pujidi.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/274cd0a29b9414ee5952713ee22b868f/75164311233.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f087d91d34f---tatoxifutigube.pdfIn PDF document text
    • http://drhkltd.com/upload/gezavodu.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/toravesanodalifidup.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/9624121143.pdfIn PDF document text
    • https://xistenze.com/files/files/devomepawaged.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3766f287---verojejogozozajagisipa.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4c8c87f1---51167066369.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bc0919d2277106158c8689a2e74607cb/29217043794.pdfIn PDF document text
    • http://maksimetall.ru/files/42012537555.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/tqcil2m25bj9h1lnfp5rqnd0o7/19650591871.pdfIn PDF document text
    • http://ccsl.asia/files/43937858396.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/441680d35ae328e7f7fef72e848ae2b0/20903316957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=line+of+symmetry+worksheetPDF 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_off0000d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 17812 bytes
SHA-256: b42b6d0460b6f9722fbd4ba42f3a00d8047f728ceba92dd9f4815f4db3b8d05e
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 10520 bytes
SHA-256: 3d23f5af84307d3662b0e78c36c0768e57afd51d89d982e9e9a77939e360dcb6
font_02_sfnt_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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