Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8fc2c5ffad55b7…

MALICIOUS

PDF

135.7 KB Created: 2021-06-22 16:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 556d5eb6c4df2d2b1668ec29411885ea SHA-1: eb85f7d0c11732c7783e16afc86a42c77f6fc4fa SHA-256: 3e8fc2c5ffad55b78b6b262dc98d8d4c7680d9ea5b5afdb29add241989178ce7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/vm4drvsc2rg2sipvmpmhia1st5/betexarepepawefodi.pdf In PDF document text
    • http://tipiland.net/upload/file/25668752413.pdfIn PDF document text
    • http://technocom.pl/editor/file/39653139272.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/tubuxupivubojuzujogas.pdfIn PDF document text
    • https://2acontractor.it/images/file/33482862772.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d0e4951c6abf0baf600c0f821ceb61a2/vedebanadip.pdfIn PDF document text
    • http://charivne.info/images/file/lepuzubuju.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file/%5C/fagoxa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805d6c2e70f---54425236334.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/3299298974.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/t72stb093ruiq7q71rm99h8cs0/89437956750.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/e7d42efa6d570e95188dbce021b4dde1/firenesovufopole.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/d5eefae82610c5ee83cc93df4589a58a/lonesuni.pdfIn PDF document text
    • http://elma1.ru/!upload/files/jiwux.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/6850230515.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/53d04e1f5c52859fd829cb724b148dde/tiwebutamexefit.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/86343302229.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210607_5DAEC0E8F18C6A06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=tatiana+manaois+like+youPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 71148 bytes
SHA-256: 561709fcef1099dc18d85a4b85f44ef2cc15a682f5c1dc1ab2f2051f6258e27d
font_01_sfnt_off0001b4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4C4 4732 bytes
SHA-256: 75acfa55567a267e83ee06a0f2abc9946b0e57d21ecb1ddddaa8a045aa711856
font_02_sfnt_off0001c4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4C7 11368 bytes
SHA-256: f9d79c59c67e22097a01703612bf23c1fa371953cf889095d8ec5f907ea7952a
font_03_sfnt_off0001eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBA0 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_04_sfnt_off000200d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200D0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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