Malicious PDF — malware analysis report

Static analysis result for SHA-256 e080646b624a3178…

MALICIOUS

PDF

68.4 KB Created: 2021-09-04 02:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e71b0af1365c5c7b9365a40f0ae6652 SHA-1: 86899a861e13642bb475f638c13e095e12c8579c SHA-256: e080646b624a31782094a21f6688f71f1b378af1151c35658b24b64c9d1e8a13
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. It also features a link farm pointing to numerous external PDF files hosted on various domains, some of which are associated with compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://itacademyindia.com/ckfinder/userfiles/files/lesilowatipomilejobol.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d6465452c---92969523787.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/salerezisofudug.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/3279292193.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/38297435772.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ad88017c5b409f20da02afb84fd0b1d9/73194206893.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6656cedb0a---varamobufimokeni.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910520aea6c---41891973349.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/650067700.pdfIn PDF document text
    • http://tradotel-riviera.com/file/tutew.pdfIn PDF document text
    • http://angkoronetour.com/userfiles/file/84266497011.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e96cf957536292e82af220bf8ee761a1/10551508313.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4c46c59d9---44776667319.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161080bf3347a8---vumezuguwisigizidibemed.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/13ae5ff67e48c03dcbe841a179d817b1/47595384717.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/44981209354.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/44115260654.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/luxenewizadetof.pdfIn PDF document text
    • http://ore-processing.ru/d/files/gemorawiponegizek.pdfIn PDF document text
    • http://poultech.net/d/files/zamejelobis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=carbohydrates+review+worksheet+answersPDF link annotation
    • 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_off0000acf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF2 10828 bytes
SHA-256: 71ec6dfd861171e6a01e6304b0c56b4f20ef2c198534702aa09b36fac8f63147
font_01_sfnt_off0000c606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 14872 bytes
SHA-256: 8ce25ad03c08802540a110d720658cce4ea583691abe03b99a189ef39e9fe566

Open this report in the interactive analyzer, or submit your own file for analysis.