Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cf96641ca44471…

MALICIOUS

PDF

94.8 KB Created: 2021-06-30 10:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e69dadbc220dcd94449b356b02250ab SHA-1: acec0a9e7f094d5233802e516e30b2402316afce SHA-256: 12cf96641ca444713669f7cab6d34d99f451ed3e9183fee030073817cb6093e4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e6be7525---xaxogu.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160accbbd714be---doxonilamimedux.pdf
    • http://ash-graphy.com/userfiles/file/83240614811.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e709308ce3---63015275921.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lnovu9i8hsqbt7rb03qk43cgmc/14128598323.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d64809f20240e3527fbfc4e3c717ec08/24486547494.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9e7a88b85527e10fbfbcea485e2d5db/tesemop.pdf
    • https://marosme.ro/hirek/file/71203107562.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097c34fb4374---fiwupoxunapopatibixu.pdf
    • https://ivanamihic.com//files/25477323727.pdf
    • https://die-elke.de/cms/elke_page_files/file/paredesuxulixinis.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b7c38665---poxolinuwadis.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a45469148a---74139357094.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6ee15d40---12146020089.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/691jpkvg6961tvt58nucpoiuu0/laxibuj.pdf
    • https://stvorki.ru/files/file/ketuwuluvipolidu.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/csr7utbkt3q8o7numim9gl4mu2/xabadoj.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d7291c34f0d---sizamodokeg.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090405b98a0d---84253266998.pdf
    • http://work4shop.cz/userfiles/file/xonewavikufokedonanejajiz.pdf
    • https://amitadevnani.com/userfiles/file/25343610712.pdf
    • http://hysansam.com/fckeditor/userfiles/image/63602257622.pdf
    • http://aelma.com/sites/default/userfiles/file/merufemofepowefiv.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2e0d78066---dimawibexofux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+crisis+of+parliamentary+democracy+pdf
    • 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_off00010fdd.bin
b20c2514364907d4ae82c70d880616d25ce2f842509391e2e1dce12dfe55f818
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 17036 bytes
font_01_sfnt_off00013c71.bin
9359a25a13c25e50fcb845c101bcbd0b2f578babfe535a32e349d095b0f67a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C71 10960 bytes
font_02_sfnt_off000155bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155BC 16792 bytes