Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d986fe4e838ba47…

MALICIOUS

PDF

81.7 KB Created: 2021-09-02 16:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8b419c774fa0a4029cab77fc952683c SHA-1: c33a2378fdc904392f9200bafa1d02004b122e72 SHA-256: 6d986fe4e838ba47360e3a9651cc36c1b9f206b866bde712073ab56ed44ee1b9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and numerous external links, including one to a raw IP address, strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://manenshop.com/upload/files/duzojuji.pdf In PDF document text
    • http://phongthuydotho.vn/upload/files/98906962364.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/2788866578.pdfIn PDF document text
    • http://c-amc.com/upload/files/birasibixobuleminir.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16111b1a337503---kolakokigupur.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/42467259702.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb37b8e63---78282524211.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f11d798156c---bedalavi.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/63186844814.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/401797971.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/guxixoropoji.pdfIn PDF document text
    • http://co-mit.com/uploads/files/20755518467.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e294e3f9---tofinakomesobivifi.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/64649350755.pdfIn PDF document text
    • https://luminex.pl/upload/file/28316688670.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/57227094072.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/95855138801.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0df41e42ebcd81cabb387c91e3c670b0/71829664355.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c05caef15e0---76366506460.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/17288141804.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/mekaw.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/29326499174.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9c75e06b6---rajavawe.pdfPDF link annotation
    • http://w-f-l.de/user_img/file/dimaro.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/13435f317e6466d4a2028e8237e24437/veputivonosunezefuwokidu.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/lotosavosusotimiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=alkaline+diet+foods+pdfPDF 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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 10464 bytes
SHA-256: 9cd84cb198be5b5c1f00e50ca099cd45f2bbc9e662de03ebd9245847a0cec561
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 17644 bytes
SHA-256: 2497eef511a9979b9360b35f17d3d6dd0d44e2470e2e06999278785f1f09f471
font_02_sfnt_off000120fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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