Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e15e2eb152d4803…

MALICIOUS

PDF

114.7 KB Created: 2021-08-16 14:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ec825d39865a6075517709e083a8241 SHA-1: c388c894a108d911d0abd228aef43a571137311e SHA-256: 0e15e2eb152d4803bbe03416548ded2aa853c277edee210db1f46dc5488c660f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs hosted on compromised WordPress sites and disposable domains, likely to lure victims into downloading further malicious content. The presence of external URIs and link farms points to a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://smidgel.ru/uplcv?utm_term=how+to+connect+bluetooth+to+a+kenwood+ddx771 PDF link annotation
    • https://lecachet.fr/docs/files/wimix.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119acb853944---sizaxe.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5575e382a9---loletozad.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075443946387---raremuruxo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bfcb208c3---90518879889.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vaguraxuvafe.pdfIn PDF document text
    • https://andana.us/files/files/gupexumazelafa.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/85555573724.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2a039cc037b7269af172625c176f3250/norufenuparuz.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/56210286610.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/vuxapewunofijomuji.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/kevemuzijikoxemutizatub.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2acb187e516c47a1f62cf913bf26fb5b/jelepana.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/k3sf869jkdm9761lgqkbu1rauc/8272239200.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///gawejefatinexanopanurev.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb179da0a---towogiri.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/41027898252.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c0d1ce84---65979598097.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ke73udq62n6qo16ui17ogjkcm2/12119280038.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e581fb4d2dfc68d9caf2ae54e6e9fed4/ropinolukomuwaxis.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/wuvinozun.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/aa84d972f156bebc88fc8af105010e81/88251328882.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986df5c7b22---61612580157.pdfIn PDF document text
    • http://brukbet.com/user_images/file/paluraxetisopukanujex.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1d320345---87376137491.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15961 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17178 10720 bytes
SHA-256: 88412b01e0fcea4928721d0dc2b2e576ad103247d52ab5692446721e4b475493
font_02_sfnt_off00018a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A1D 18532 bytes
SHA-256: 648f7cec9fafb9577c284780517d1e6e9c0dbc50456f416fcf5d5526d2dfdfab