Malicious PDF — malware analysis report

Static analysis result for SHA-256 a033e99f27876b04…

MALICIOUS

PDF

89.7 KB Created: 2021-09-01 01:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7ae3f4f23863dbcbede09113075e49f2 SHA-1: eb031d71885b4de8f885c38f163e7d03bae7b98e SHA-256: a033e99f27876b04d3c5498eaad4c0a573bc506b114d8fab1ee2bb0ea7e86dcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress sites, suggesting it is designed to host or redirect to malicious content. While no scripts were directly extracted, the presence of numerous external links on compromised domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1f50a4123---1132106016.pdf In PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/97511097221.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b35dc7e7906cc4aa0e3e90f0f98eaa54/49368997515.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/negoreta.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/61070042037.pdfIn PDF document text
    • http://bakoca.hu/files/file/valivalejumisawi.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf355a3bfb---tufejubufop.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/24697312113.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/78241164778.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b4cf3d1826a1c9809c3a3d684398110d/towugikefopurazug.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/h0m2genuujl44vbhmq8rkg9nsd/23742836469.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e5a844433b9a4f7de9bcfe29a9f61ef1/2107385528.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/9522035eb1e6301179213c815fba9f5c/detolifov.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/72d490a88cd85a9294fe2f2587c4ec93/14696452394.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/pedaniwiruxonis.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/67397964610.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2445099284077f80a5bb8acfe3de7d0f/70343423840.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/10418954673.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/62417913626.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/k125h7k46nokh31oapa9r1cink/14830038337.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/xegepalo.pdfIn PDF document text
    • http://greenbrier101.com/userimages/jetelofiru.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pctbrhbd8bfjsck6epdrmb8op5/gumejunigobakomonojujor.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a2c6a1065d00ff14b958f40e68033ce5/dovol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=array+to+string+conversion+in+javascriptPDF 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_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 10792 bytes
SHA-256: 5e7a2f5b933ca0594ed255324b362d0f211b67586526e489ac9e7a6377aa2f89
font_01_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 22736 bytes
SHA-256: b78af4cdaf21ea4292040b4ff5ffe9d23ef5ce25be873936fd8dbe86107dc9af
font_02_sfnt_off00013ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.