Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b0ec18d2fe88c4…

MALICIOUS

PDF

92.7 KB Created: 2021-06-29 16:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b12902c362d65efe8ca637a9f6619243 SHA-1: 1d132397894b0bb711d26d027657dfcb126598da SHA-256: 02b0ec18d2fe88c493e8b20ee0869c432b58d51910788f01affeb13f0556e69b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c978da91a850951229e5eac7dd3d11d9/42273259094.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e3b6f17d6---88046351916.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4b71d855---80697356084.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609827c8e8c4b---sexumovago.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d5154ac14---kutodebujuzelapedudo.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c1423e4b---28240775450.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fvkiicr1ioi7i482uk4ti9h11n/nufavewawibeganodi.pdf
    • https://area5srl.it/file/30092256703.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080771820918---mejolaveku.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c5aaf71f---wonubatemef.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/1b466f92c0c1bb45f3176dcd85ea656b/bobogisuxulaxuju.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/6789ca8358a78856c837475284cbe385/14768077839.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ae16c2389726782bca9ad74a02a3da46/18389310004.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0bd032c87---73456034677.pdf
    • http://sbs-group.co/userfiles/files/lorurogulomafe.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/1b22347bef6a53cbb79eb72b5fb2a20b/41167375278.pdf
    • http://cupta.org/userfiles/files/20210527123647.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a09835ccb5b---pijanogekoloxavovule.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9e41eaff17a5e7e7e4d03f01dc8aec27/mivatonuduwexubodutonux.pdf
    • http://naturallabs.de/userfiles/file/39981249123.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8963ca3f7e---wosobepanova.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/5drrbbcvbshb9cf8d1j8cf43kn/27000786937.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6bf5c92cf---67817174200.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9k8cj1rafcii82uq0sblbi9nuv/rubulumugul.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a8f070c8c---39449429334.pdf
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/4f94fb9e072aa0c3881c762d59364615/dinov.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=exposition+in+fiction
    • 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_off0001098e.bin
edb12ebd3bf58d72879ebf14cef1377d9c40883796db38fcb48d8113684a6d4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 17516 bytes
font_01_sfnt_off000136cc.bin
9b0dbcf2fb38185b7979c56d9666b59597fc420636b76b538e825c08e5fdf6d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x136CC 10120 bytes
font_02_sfnt_off00014d8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8D 16792 bytes