Malicious PDF — malware analysis report

Static analysis result for SHA-256 1747667b3a42f09f…

MALICIOUS

PDF

104.6 KB Created: 2021-09-01 13:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2765e220119e323353180b45e29bf064 SHA-1: 76ac3778400835224f20e1c6130adc044e7a2efa SHA-256: 1747667b3a42f09f6e6d38ffe97da0c04ce14cf918994765d6fa2eee87f1ca92
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation or the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 8

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=charlie+and+the+chocolate+factory+full+movie+123movies PDF link annotation
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/tipemes.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/tojizumepusinifi.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/rirusiwirixuvudigipawov.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qs52mfmshr06oclrfeug68rf7n/rizoruxovu.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/23fd040949b57fea088d3e1c3b167db8/nusadu.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/52464228168.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090c6c18986f---widigogubuwokaxaxudisupur.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/76915346963.pdfIn PDF document text
    • https://nevisnews.com/userfiles/85672878972.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6455a0e9153c26395a5bec14dbf7ad42/41270344771.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/11724951349.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/gabazalevaperexinis.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jf0trtf4cjc4omj51s66n4382b/76317722603.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8d4350ef---55227008612.pdfIn PDF document text
    • https://thietbidiensino.vn/media/ftp/file/27650972545.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611d73198a973---zevakuluxuriretodowo.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/81962176382.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/15974948449.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/3110736077.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/pefikavigibuxumoxij.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/28038892775.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aebdb71c6---93472273862.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd1e13cf1---vowisik.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_off00012e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E51 19388 bytes
SHA-256: 4c75c3b215dda900ccbb8c3d019e65ee56c9ceb86b3ce0553fa67fbbbc010b3a
font_01_sfnt_off00016163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16163 11396 bytes
SHA-256: 764ac9f39fc118b412d0ffc2820beae59be838315e4283bab269a07d8ca64cb4
font_02_sfnt_off00017c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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