Malicious PDF — malware analysis report

Static analysis result for SHA-256 486abd05cd5b499d…

MALICIOUS

PDF

77.8 KB Created: 2021-07-31 21:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4493ca56006c051a54342f79395f0163 SHA-1: 7fb3c1e8c521a6ac62cbe4347c499b872dd885e7 SHA-256: 486abd05cd5b499d0ebc10a51a1da590c91a668b6770ec50f4cb25c5c436f498
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15cd4b0a1c---muguferedoxifosig.pdf In PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d25356b26---10047866041.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/fagigofuzunapo.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608803d0a2606---pixonufuwila.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e127966378---23601561532.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04b931d130---26347793172.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/af30549dc5cb88e16c67b52ccf42a238/59385071530.pdfIn PDF document text
    • http://asustainable.com/global/file/fizifa.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/vezabejepunumuwakivokev.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sapeduriguxu.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/30401653219.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a2e22025b---fewulutazirazinamebofog.pdfIn PDF document text
    • http://446888.top/userfiles/file/sexejefelafelujale.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083250109eb5---vedotazarafizibakegasax.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/32905071317.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/mopogoxojipojilivap.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0dbbc2c91---5755539766.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0c25ca884---wemituraz.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/95791213277.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/moxonipufijotuz.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3eebefda772c2322d05aa1842243ea26/9880875803.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/xupuzegon.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/gotarerazaj.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/44272441954.pdfIn PDF document text
    • https://bfull.ru/uploads/files/lenegimozozagixetaxegotut.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077c15d50d93---49058595420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=uyirai+tholaithen+athe+unnil+thano+audio+song+download+mp3PDF 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_off0000cb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1C 16480 bytes
SHA-256: 8bf1534ed88a74fe6037e239cd3ba6fe309f24c5f13c1c0b3cce3fd0b954d5ad
font_01_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE4 11316 bytes
SHA-256: 5e95a134b0e2bc385d71b52b487af5f03993421038e1fe59e082bcf343ab42f4

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