Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80e0fdc1d8052ac…

MALICIOUS

PDF

88.5 KB Created: 2021-07-27 08:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0f374e817c66bfef1d08f583c39fa5a3 SHA-1: 1414a3a00d6a886fa37f80794b8015291138c7c7 SHA-256: d80e0fdc1d8052ac837092bc65cf37c46e7cf73b3e46e475dd376bf0a269a3e5
164 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on compromised or disposable domains, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gibisch.org/files/files/18296452718.pdf In PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fc4fd44cf---numivifopofanududifebez.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/vesivoxarofofomek.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/gupusal.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1dae556c3162dbb3992dba45d15f14c3/37842400578.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/rumorom.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/talivum.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/53923891739.pdfIn PDF document text
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/54760530033.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/latomagusafomitamojivipoj.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608edad4b9626---63065582903.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/27425747576.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/dinafesa.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/76174434325.pdfIn PDF document text
    • http://www.520amis.com/upload/files/36441996632.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/25a4de89c91f91d46e392583696854a2/16364963088.pdfIn PDF document text
    • http://calliopegoodrich.com/clients/73417/File/pesabevufasixosag.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b0227c6eb---kememamot.pdfIn PDF document text
    • http://livestocktool.com/d/files/49864812401.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/139434a7b38b93aba4602aca7cfc9d50/72977655814.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/d02l59gv0and4sn0jnfg81eu50/dapubetevojafukigeximo.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/12322559842.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/niwenetije.pdfIn PDF document text
    • https://x-software.cz/data/file/vadavabuvonil.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/lonimiwemile.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/1905332917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=standoff+2+mod+menu+iosPDF 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_off0000efa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA8 20208 bytes
SHA-256: 530bd9e6c5d3664d063e700588246fb97dfd1afeb64e735f7747905be137e798
font_01_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCE 10664 bytes
SHA-256: f6941338a63f588eb55e6e0a91e6f1f77a77b9430456ae54a1f2f54226cb6e20

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