Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73e9697bec465ad…

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 12:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 108ee71e049371a5ce9af1325bf3944a SHA-1: 70b0c6957a93811b372fbb7cab59b66a07f1f5ed SHA-256: e73e9697bec465adc3ee3a4cda83449b70ade2d7d650005c386b4122b61243a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent to trick users into downloading further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • 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 https://infrive.ru/uplcv?utm_term=watch+descendants+3+online+free+full+movie+123movies PDF link annotation
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408c4004106---teguso.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/dowodobelufune.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/22239577785.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024dbe9aed---botokekomesosineropunos.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/sarixanetiwibegaxopelenuw.pdfIn PDF document text
    • http://jarosi.hu/files/file/wigafebojasufipebijen.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/romojujamodaniguzuwi.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/30597284280.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/tijewowibofisimijisuwoso.pdfIn PDF document text
    • https://felicityokolo.com/file/56779802219.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/jiropuwajuwujaxev.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/59964677040.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/25287835103.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/dexofogamoxuxemezu.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/24472335749.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/potokup.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/bb5ac0be9404fecfe6cb8f437238fa85/navudinu.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/robewejewaz.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210909175318144.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/46672474413.pdfIn PDF document text
    • http://naviway.su/upload/files/15716940231.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-17/20210917062631908985.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fedc8dba2a---zegezuxevawekazonasegax.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/18138624359.pdfIn PDF document text
    • https://estoniapools.com/contents/files/80286904556.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/vosegenadupomoxak.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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 11244 bytes
SHA-256: 3ca4365a5b94faef1a201e1ac3f5427232bf4bb5990f2772131ee2de58fd383d
font_01_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001194c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194C 18240 bytes
SHA-256: 25e98c0fdffc2a8d282fee705a90fdd9d713fb687703a7ad972c6c763d42df35

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