Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae25a4f631002bc…

MALICIOUS

PDF

119.1 KB Created: 2021-09-05 13:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 99ac46c01c96db561f783818094d4c74 SHA-1: 809fa6bc4732c3f73c07ecddfdce01352b6a0493 SHA-256: 2ae25a4f631002bc6b47e07a8a2c2499a522a63d27e916f7e0851651e47f0d65
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160fafc2ab34b5---dolapodeve.pdf In PDF document text
    • https://alianzatours.com/imagenes/file/64703561024.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/94284065694.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/fulalaxi.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050102490473499.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cd47c427f---890573318.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/luvarolukajanejulol.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/kukitetazuwajatesibogon.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/212759db2da45e38fddaa729e9446123/mabuvabobopekujejorob.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091224b9f09d---masodu.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/zewosaf.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/93490642447.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec596ab79c---lenegituzipimenutojopul.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/zenubafupexagig.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0f78470c---39333211971.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/pacoe61lts9tesvcmqevr6gclg/76301722632.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103a6e25e203---bogawiwozikivobux.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609652bf8ce61---16814688291.pdfIn PDF document text
    • http://vhz.cz/user-files/81405459238.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/44649395421.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/26/file/20210626_060022_200.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/xutaxituxopomusidavizav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=true+story+of+little+red+riding+hood+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DA 20344 bytes
SHA-256: 502173ecdae3cc7f868e5697e64e7f28a167a4b10fe226fbc314ce05b8a296ce
font_01_sfnt_off00017e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E26 18976 bytes
SHA-256: 11aa7b7c50b48fccd2234109ed42e68cba37195ada6f62335541920848c5f6d4
font_02_sfnt_off00019d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001b52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B52C 10792 bytes
SHA-256: 1ba0bf89ca4b8427bb1b078b072edc7e4890aff9c04548a01f0a62f485b898d0

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