Malicious PDF — malware analysis report

Static analysis result for SHA-256 952ce1f682cf5cc5…

MALICIOUS

PDF

80.8 KB Created: 2021-06-30 10:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 25a14f6669f80dca9bd456291831e51b SHA-1: f42ebaacd53b6d357a3c5a4eafae77e3600cd59b SHA-256: 952ce1f682cf5cc57e91d330799840557e42ee97d5eec5ba01cba6ec7401bb8f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the embedded URLs and heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2743ffc64bd5f69cd92e784838cdce87/doripi.pdf In PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0a1d59ffc---gemarutu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02079403b4---14106772194.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3955455e2e7d37937748812cdf293dd/93016936428.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/99a71192807c1062ef4776d289f478a3/dowaxafo.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/zetepawiferirojoril.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/3c5852686067266a3324870663cb35b3/kotute.pdfIn PDF document text
    • http://jp-cable.com/d/files/22300365428.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d10da7db93---bevavurojapinoro.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9043e69f0c---32325423167.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/66039709939.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ettou8263tdmlgjf9iul5heaui/7137031703.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/79ln1uv1cf8ab1gd3h7fhb12v0/23006105974.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0ad05011af32d5d601206177f006919e/sazavezopero.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/gq7fv8ngjlnfmf832iei11k0l6/dogigakamaxejogew.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/lojiximukotalakesonara.pdfIn PDF document text
    • http://digifast.cz/userfiles/32973237768.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d0b3a5d15709068baf91a68b542ac115/lafixijakowageno.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41f5b1874c---62647817381.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/57fc04f67b0f55bc79f1332554911484/birivefobukodujasi.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/tuwabowagewo.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/ce5b488f1fb4950d041ebc98afe804f3/lakokebikunojevigew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=give+any+two+real+life+example+for+congruent+shapesPDF 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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 11432 bytes
SHA-256: efc53f460eac7605fd74a0deca2fcf0d9f9b61a62dbc90827310cf3729d2a66f
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 17248 bytes
SHA-256: 83f779decb226c6a4c6cb366cbd64e9e76573b0cfad8e2aeaf3d6c41f8a4e375

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