Malicious PDF — malware analysis report

Static analysis result for SHA-256 892bcb59f79c11bb…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 09:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54c7e709b3387417183d07f7011ebe0c SHA-1: 162c7f9c02547e116b8d3da84f80a4f9933a9d1d SHA-256: 892bcb59f79c11bb2af9fb6f034a15ed4a454e8bd0e5f4f0eec1e9b15964ee48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links. No scripts were extracted, but the overall structure and URL analysis point to a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/j9tr4d7tu1hh6r5bgqldlaamce/pepiluwusonoxe.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160921c542f5d4---98758794468.pdf
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/mixuparepife.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f7e6ef3b9d755319b56e8505c052c4d8/42187912817.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/2d260a22806ffae1b9257c8466bd74bc/podero.pdf
    • http://bostonmentors.com/userfiles/file/guvonadizerafo.pdf
    • https://alakharia.com/public_html/userfiles/file/90715117354.pdf
    • https://protradingindia.net/userfiles/file/58300342787.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d3fd54f6390cfc6f61df6765c2a1ee08/sofefupomuv.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/losifuweviteroduremuner.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084dc9ed09c9---wujarusada.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fdcsu41kba4hpo6fqaasqu9hg0/17362631079.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/06463e03620e6b77c66df19ccd984870/bonejijigoliz.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077feeb4e12f---35267687964.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8d409ab19---35827322090.pdf
    • http://www.asap-recruitment.net/upload/file/vukabotal.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607f865e9edf5---13446007935.pdf
    • http://pwmtqatar.net/userfiles/file/livilajiladafowikosixi.pdf
    • https://bnbcostaverde.it/userfiles/file/39854477445.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa64f7c93ea---zigiposazijibojinumezodis.pdf
    • http://eko-inwest.eu/upload/file/16914799076.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985081ae544---48179235721.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gta+vice+city+car+mods+pack+android
    • 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_off0000eb1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 16792 bytes
font_01_sfnt_off00010335.bin
43b98497c4d44f6be839784440874b2c8dffa1f18454140453df02cb6d6a1255
pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 10940 bytes
font_02_sfnt_off00011ca2.bin
408b8010c637a336eb9142bb125937e817773b73a4f60d6605816532ca98fbf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA2 17312 bytes