Malicious PDF — malware analysis report

Static analysis result for SHA-256 e355e6938410bd79…

MALICIOUS

PDF

83.2 KB Created: 2021-09-15 06:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e7b8cc78c565b8808e05b4312e370ceb SHA-1: 852130671704a42c0c49c4538838d550f07e406a SHA-256: e355e6938410bd79a3c62e69233a6f936b7fbd49108e0b5d1e5b0382f7eefa6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains or are hosted on compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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 http://vpecargo.com/userfiles/file/52397850990.pdf In PDF document text
    • https://nevisnews.com/userfiles/didunagorugesulo.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/tuvapapodaruwajukuta.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/zifefodagedigowipizexu.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/sakawena.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/vodekij.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/42224876101.pdfIn PDF document text
    • https://atiksigorta.com/files/30160808793.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/gajetuzonuwinifozivavukiz.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/tidazamotixokufi.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4b04a661b0663a50761b127063745fe0/90505117088.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/binodizikizijoxi.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/pajunajizawu.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/xememulajukag.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/sodagijetoraxapag.pdfIn PDF document text
    • https://beautydent.hu/editor_up/60055387581.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/guvarazolofepukabop.pdfIn PDF document text
    • http://gojjang.com/uploads/files/38592736387.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/356061e0eade1266560aff981aa77b71/50977944806.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/12398148356.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161413aa3d47ec---sazafaferanujekutudezarot.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/gowexomutosovevaded.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/73685769434.pdfIn PDF document text
    • http://tfforming.ru/d/files/dogavovuworadevoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=asce+7+16+pdf+downloadPDF link annotation
    • https://mediaget.com/userfiles/files/nerujifabisajulaxeta.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_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 17876 bytes
SHA-256: 10adc1292676087064c47b85a253da5a04846fe27b8307db6393c691d950bbda
font_01_sfnt_off00010e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9A 10660 bytes
SHA-256: 094dbfb895b149a836f10fbad4698c0ad4c93dba642a3317187ca49ad1d8505e
font_02_sfnt_off00012764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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