Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12fa1f13ea766b8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 20:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16198d7148b5dc79e1fc1cf1bef73c39 SHA-1: 176c205ab28a024d294a5813e57e9d4990e3f21a SHA-256: c12fa1f13ea766b86f6f2f1eb09d8ac125eb82a9544e6aac4a13a233809c4214
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS platforms or disposable domains. The presence of multiple external links and the nature of the hosting suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://files.ibiza-ferien.de/file/68917538371.pdf In PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/duvutojinedaxubo.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/23f8ed9b26cd46d238b942fcae6f9e0b/dedofipinojatuvixafemok.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/34708489981.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/17778438975.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b6b4f2b22---xomonitulilajumexelotu.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/efcuho1mls4q222ca5h3lun7v9/wemifosikonurefakobalasa.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/zukariruvunozibogule.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/33198121883.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcf974e1218---58752038645.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/natiwijawapufav.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/kotupe.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/43274114708.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607719b4d40d4---poxelugagezedenenorekilas.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/8bc086a0b44d711254e7379ad4a3c36a/83509508329.pdfIn PDF document text
    • https://cristalensi.com/public/File/nijojebom.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ced17c6b---38922118942.pdfIn PDF document text
    • https://schmitz.cz/res/file/repuxukoru.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/14136894373.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b600fceb4a0---81902554984.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/94076746304.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/61706fe32f95b03fcd1c5df1f048c6cd/zeboxemixulabiwumodexe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=definition+of+personality+disorder+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89D 16912 bytes
SHA-256: a7ef26111e5a84833d4ea723a35d758d065359b5a0c8fdcae7e1eea1a05ae1b2
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C69 10608 bytes
SHA-256: c70519cd331574547024898e1e86057c0c0c335ed4e3a40372112f0bf8697af9

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