Malicious PDF — malware analysis report

Static analysis result for SHA-256 d456830462c1ca9b…

MALICIOUS

PDF

75.5 KB Created: 2021-07-10 04:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45701bff9d8eef3de52d2518f6c3d6e2 SHA-1: d4d150d66627419687593b6eb283ec715cf47dd6 SHA-256: d456830462c1ca9b184ce731fc6ab33fb78b1c86ed9461f720f8ccc7742453e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The file contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content or phishing pages. The presence of these links and the overall structure indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160831a1cc8e83---49229440219.pdf
    • https://acgroupenterprise.com/userfiles/file/69126025573.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608899e021b7e---54231118914.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160729bca5da72---54373388475.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/6397972892.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/0kdab81hkvkk6dhm722o41plqo/66074866075.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae294d292b6---mujoxaz.pdf
    • http://ahsaipu.com/v15/Upload/file/2021521057357836.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/78c4b10ceab07d1a45bd2a37ccad2eb0/78535191043.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607819db2c245---50813377340.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/bepaxasi.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/73bd3a3834f28676abdcbecbfd9fcffc/47121127215.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/526baf941541a9c96d12fd00aed01610/gigesek.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dea5103c1---ligofodivolevukakani.pdf
    • http://aaaexpressheating.com/userfiles/file/98595217256.pdf
    • http://linkingpeople.info/userfiles/file/30115011427.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55dc10e7cb---12763337876.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f70459078---visoruwerifoxizajekitore.pdf
    • http://ideatity.com/ckfinder/userfiles/files/1483865961.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/3288026645.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a41f69f658aaabb30f63611841b2e600/16223425342.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429110431908285.pdf
    • http://proxima-design.cz/files/file/74252612085.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ps+gill+engineering+drawing+book+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D7 16792 bytes
font_01_sfnt_off0000dbee.bin
e6c8a875242408ecddcb2c13b7df59f7430253df44e211a7014fef1a65531779
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 10896 bytes
font_02_sfnt_off0000f4d8.bin
4c4e61ef202ca69de51f2de0206b93a3cc69ed334fa548e639bf7d51997a9aaf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 16912 bytes