Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeb56df8cc193a1…

MALICIOUS

PDF

84.1 KB Created: 2021-07-05 01:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fcff80e6ebae7e708c7ed53c3a733bc SHA-1: d84afc1ec4f56c78e51e0513944bd4b0fd34e325 SHA-256: dbeb56df8cc193a10fb81859c753bf93bab5cc0f1322b79979ff69dd9f940588
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a1f1ced02902e938833a219c481cd872/sobumanuvejujerewanovoze.pdf
    • http://kojeneckezbozi.eu/userfiles/file/burelusijuzisedalajil.pdf
    • http://nuitsdartistes.eu/images/file/69111652024.pdf
    • http://derma-dts.de/files/file/nojitibutotonikebakov.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/nimuf.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b5dc88e35dab732271e3f05214a2f4f5/zibinepojopik.pdf
    • http://antifftech.com/uploadfile/file///2021050522554323.pdf
    • http://jiehuist.com/userfiles/files/mutebananal.pdf
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/s445fendrhm6n7n7dsaou2pkpt/riguvuru.pdf
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/86231585645.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/3ffc76b86b13cb154caa9035651cce24/79176077184.pdf
    • https://bobecoingatlan.com/uploads/editor/file/faxodefusidikinavekizor.pdf
    • https://fallsplat.se/file/71647054897.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef409b103---kaduvag.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/9igp4t93ri0n44bjpt6plipea4/8979918775.pdf
    • http://datavincity.com/uploads/ckfinder/files/mekarulo.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0ee7227265c219440c2dd41ab8805c43/xogitivumenivonena.pdf
    • http://chichen.asia/ckfinder/userfiles/files/fodamojudog.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6336a90de079bda5e9cffedfde7a7750/95123226665.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/ee436d09a669ca169a6085807f825583/64445882143.pdf
    • http://iburgisidimarsala.eu/userfiles/files/78460519157.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad8d093e7---28160274083.pdf
    • https://alshamiltrading.com/alshamilfiles/file/27618914015.pdf
    • http://446888.top/userfiles/file/ruzebuxaxodokupaxudajo.pdf
    • https://cahayamimpi1.com/contents//files/fodaxo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=i+have+a+ball+in+my+jaw+that+moves
    • 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_off0000e7d8.bin
0628414c80622d7681e01a5d4dfdd484d65dd711bb2d7ba2b6b404fa7053a4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D8 16416 bytes
font_01_sfnt_off00011255.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11255 16792 bytes
font_02_sfnt_off00012a6c.bin
7da2fdd8c965ccb3606b04db52f0f4fbfddb3a435eb3514b85194c5ae4955dbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6C 10760 bytes