Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5dd1405c52834b…

MALICIOUS

PDF

81.7 KB Created: 2021-06-27 00:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d2ba5ffe2fb4b55e7c60222c09e73738 SHA-1: b06c6d7034aecd1e586f5f86d1ee0c245b1df473 SHA-256: 0e5dd1405c52834b67a28c59522cf122a083c9b37162ee66ab8d41492403ac14
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's used to facilitate phishing or malware distribution, likely via embedded JavaScript or other exploit vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088e479ba6a1---gisugowotipi.pdf In PDF document text
    • http://sake2metustin.com/uploads/files/lexipaxexutevobolaramusu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m1ukc04ukea54p9lc7dj6583l0/29743953801.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/lilitabakulatebum.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a03adaafe---ropepuzovelakokeraru.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/bosizenarelivaxijojav.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893fff31466---95997482555.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://malbreil.com/userfiles/file/leferidoraguzopuw.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7c6e5a79---92776837534.pdfIn PDF document text
    • https://isleo.com/i_photos/file/masimevimis.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/92625392060.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/sigomimuzukikakoxalo.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc22de6d55---69506878278.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/e1052124c26b2613ff9e5eacdf1d5e53/wozenalufogabufamopefe.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8aafcfb8a---nelamunizonixajime.pdfIn PDF document text
    • https://digireg.it/upload/29950691556.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b83da790e---85185393655.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/tuxovug.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/84277282454.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/dc3b3c61904da426a3a3b65a6fe93655/jevogivivisavabemimiw.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/762cfbf2d2f84471dbb34f00d9d1cd80/55636751255.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/fuzesuvetiwatarafewuviv.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099ff45ca2cd---85273829135.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d409e8033eb---pefupiniminutatexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+convert+jpg+to+pdf+photoshopPDF 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_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 10872 bytes
SHA-256: 05f78581865208627479d6211e43f2c499c561c1ee4bba19edf74b51bdf286a4
font_01_sfnt_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 16816 bytes
SHA-256: db282736b45f3e2e1aba6a5162692c1b5dfe606114804fe42fe49ff353abf796
font_02_sfnt_off0001211a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1