Malicious PDF — malware analysis report

Static analysis result for SHA-256 78eac26f634203cf…

MALICIOUS

PDF

85.0 KB Created: 2021-09-10 18:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a19aa95190cd6a30cd39d4de16dee2c1 SHA-1: 0d1dc3837551549dd0e5a72473b65a1f31fb8515 SHA-256: 78eac26f634203cfcc31df4723beb5e6f9ce48069002f2c3526185e5015a4737
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to trick users into downloading further malicious content under the guise of game downloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://portaldo.eu/contenuti/upload/file/lupuribanidirawosadorano.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ad91cdfba---35265964246.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/13701235924.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/91711075090.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210909185934.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/poreleguborifeminevilafo.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210909100345.pdfIn PDF document text
    • http://findusafranchise.com/files/files/ruwisaduzas.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/batonajeladiw.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130f161f1813---88478432431.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0f8ad05bc---wipeturabufutelabikulewim.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/bogax.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/hf5hkdv1hjasa69mgpfq7e82pt/jutuvagojonexero.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/41044420580.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/42349731893.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135992909266---xerafuju.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/sosimufim.pdfIn PDF document text
    • http://ikcem.org/userfiles/file///tigolafef.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/68773090299.pdfIn PDF document text
    • http://ingore.cn/upload/files/45198045038.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/ca6774e2b779867fa70a50f2466d7a03/90440594286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+and+play+flash+gamesPDF 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_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 10856 bytes
SHA-256: 5caf6af2ce2089d7f09b90de69a8ffcabe573294f54cd71018f8290b2c80216d
font_02_sfnt_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 17648 bytes
SHA-256: 4ca07b802a1a44aa317079eaa7adf7a29ddba0e9910057cd4867183e5dbd8bd5

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