Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a985c2254df9761…

MALICIOUS

PDF

68.6 KB Created: 2021-09-04 23:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9098413ead2f7fdf19a4c80e464eec15 SHA-1: c5fa5fc05e9d02d443d4f38df121833fed5a3c67 SHA-256: 2a985c2254df9761ab62b74384bb93314ade3f7c3e6a1204c438ad377f95835b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristics indicate it's part of a link farm hosted on compromised WordPress sites, likely redirecting users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://laborke.ru/uplcv?utm_term=gabung+pdf+soda PDF link annotation
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c70d1c470---33198500751.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/tcbvqcq73mlppdn9dn3d8epueg/81554268122.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/l43kp83chd1gi6glu7mjo0rlu5/jisadivawenisajipa.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/81154236751.pdfIn PDF document text
    • https://jagominum.com/contents//files/96074275422.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/28874712620.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609434dc8711b---nogikipiwijofomubi.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/92624709336.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce83b07cf4b---latutesopebusesabibix.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/53095285062.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/34195138880.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160885734422b8---74242821187.pdfIn PDF document text
    • http://jaatkinson.com/userimages/50794527071.pdfIn PDF document text
    • http://fruitvita.com/files/files/vanufenina.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/3492219095.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd8373992---33575561133.pdfIn PDF document text
    • http://gabortech.comadmin/file/37975768589.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/rubujoz.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/1292057877.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/1500773361.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/ramubabelupamizasu.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/xosaxole.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba26dcb8902---kixilamibutone.pdfIn 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://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_off0000b154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB154 10484 bytes
SHA-256: cb1ae9e7b5c6a141f2cf7e40765abab2adb65f9ab173c2bca1ab8c6b7edeb9b0
font_01_sfnt_off0000c8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 14096 bytes
SHA-256: c61aa100aedfb9065cb62dd974ee6ee0419a161ec437414ff502c0b6eb428000

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