Malicious PDF — malware analysis report

Static analysis result for SHA-256 d347eaf6bcc72d9f…

MALICIOUS

PDF

90.2 KB Created: 2021-06-17 08:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17fb654d73e58f3c077373e98892f5eb SHA-1: 6856c53b16ac0876d8244de8824c77602d0de5a2 SHA-256: d347eaf6bcc72d9fa92423685f07718d0384dc7f2e2d9649814984065691cbf8
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads or disposable hosting, indicating a malicious intent to distribute further payloads or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded JavaScript likely facilitates the execution of malicious code or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://garglob.ru/uplcv?utm_term=yann+tiersen+piano+pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/zekuwosoritifadifuseja.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/66810371794.pdf
    • http://614move.com/clients/4890/File/marifufo.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c44f061002e---71557176189.pdf
    • http://kcde.kr/userfiles/file/25714032117.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/eec691973851636cd7ff791a97248c46/malubizezajagut.pdf
    • http://automsystem.com/UploadFile/file/20210508071723173.pdf
    • http://grandrosso.com/js/upload/files/luxewutaxuzu.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/d05142c3f0f057f24d84e27cff334d1f/fajabimara.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6bf6f327fa7eeb611b4c661a3c072343/12190957531.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dc5ba5640---91398093070.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/208781116609fb03029548.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c140bea5cfc---pumuj.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/41368573840.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/c64jalbchjg185btqr3n8aa02t/9504395916.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c34445f22ff---xulofotamunisu.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b05dacb170b---kumonenusawozalog.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f07409e531d1f533c24ee33df325a205/8443397365.pdf
    • https://andrejc.si/files/file/18632324786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef0.bin
b74f149f73e58182f3ab61f0ff3279cf93195b25acc8410b72325d19c2465a05
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 4752 bytes
font_01_sfnt_off00010f13.bin
ad0f7ccb665d0994e2dfae0c73e7cfb5e7d3bbb62d959fdf9f05e44b207d1c1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 12480 bytes
font_02_sfnt_off000136fc.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
pdf-font-stream PDF embedded font (sfnt) at offset 0x136FC 16060 bytes
font_03_sfnt_off00014b96.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B96 4324 bytes