Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66e8cd2a88dcac5…

MALICIOUS

PDF

106.2 KB Created: 2021-06-12 18:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a587325d461d63345f269a2688b4a411 SHA-1: 7cd4649458a51666ab599c2d65e7d34d3470db1f SHA-256: a66e8cd2a88dcac53b32e380ca7a022fa81948ff66ef3bc484bcf92d1a234e4d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://oniceh.ru/uplcv?utm_term=dragon+ball+legends+unlimited+chrono+crystals+apk+download PDF link annotation
    • https://lamaisonducoeur.ca/upload/editor/file/10584378582.pdfIn PDF document text
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/23583194318.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab20755b824---jonatufid.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/45753dc4ba68317207bdc0c01ae16c46/bosimezarapadijojamo.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b0bfa0e723d57b29a6125295658bf0ee/piropixodoke.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/7t98f533pqp7h6dv42ato34aq5/99137155965.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/3feupi74odch9ahles1tl96408/zazajadamijuserutujawo.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/11d9dfd85816ff9608a5be44e5772c55/5871068822.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/jatumilazepuxoxako.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/70livhu85hq57q2p56tjh7o5bl/82201717819.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/35025009459.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070329215906---jajijeso.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/8330757466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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_off000138ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138ED 3008 bytes
SHA-256: 8790bd5fc860027f0c609dedd60a4fe26ab7585e53cd7b008652dc181f7efb38
font_01_sfnt_off000143ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143AE 5884 bytes
SHA-256: 245db8497aae2b5dd8f10f37c05db155a26d3987faff8d6df16df5d1ff976066
font_02_sfnt_off0001579c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579C 2476 bytes
SHA-256: a4ac9b20bdc4ee89d3136935b4b01a6447cc09021602bd7fa648e6c3fb340b64
font_03_sfnt_off0001621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1621E 9980 bytes
SHA-256: c445528a27d71570fc37a23d093996e575907331f55fcbf0eb36688bf6bcdc48
font_04_sfnt_off0001848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1848B 16420 bytes
SHA-256: 2753fa1a130950557fdad794d19afdd285e461ce6ba23323fd613af5cc1f8f67

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