Malicious PDF — malware analysis report

Static analysis result for SHA-256 098c45acc4664240…

MALICIOUS

PDF

89.2 KB Created: 2021-09-02 15:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b04edf6b22031d69d8a80637df26d8b5 SHA-1: c478048d73627a2820e1ef04f195bebf6b9e761f SHA-256: 098c45acc4664240a4966e6d1fee00e67d4b55a99bdabd18f15ad19b269723db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ngaa.org.au/application/third_party/ckfinder/userfiles/files/pubiwitonigolu.pdf In PDF document text
    • http://saktigroup.in/uploads/vipogogexi.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/79c80b645bbba401055b89f0a837e4fe/62535915190.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6d1f2f21ac187c4a5ed51400704dc480/27818246699.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d751b95d---kefukenu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4bff268a86da5b2c045547e2333687e8/12855112535.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/98929314185.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/72068246748.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/tosodirudo.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210715_082701.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/614d87fa0a76e9b1c0365f895943117a/76622518119.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffd87a63fc---38999534590.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d582858b786---lasipegeg.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648d10201c---bexibejizujovorejevuw.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b9b26f70a---tefelozunupuxar.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/mawipibemuzujum.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/tuvipabesap.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d199e44c15---losutowalado.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/36897959030.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/joliwupexa.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161194995cf801---96998363926.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/84702812811.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a89c89b6b---gugebaluwokixolejazu.pdfIn PDF document text
    • http://capri.lt/userfiles/files/depovif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=tormenta+rpg+pdf+fichaPDF 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_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 18344 bytes
SHA-256: 7d9dac5692fbf0d32682bb56e1afea464b94533f53c1c265809e2752e60f8353
font_01_sfnt_off0001266f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266F 10816 bytes
SHA-256: 677c537a365287a5611f4925f9f38110b9e78c044a7daae4c07616d57f18259f
font_02_sfnt_off00013ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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