Malicious PDF — malware analysis report

Static analysis result for SHA-256 626f5dafded03a5e…

MALICIOUS

PDF

105.8 KB Created: 2021-08-30 01:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6af4c6e359404031378b88f0750f6ad6 SHA-1: 3469d9b5516c457df00f7550aec8fffc56dfdb2b SHA-256: 626f5dafded03a5e31fe379db7ee7cf3b291de264b211d988efa0877a60006e0
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 ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a distribution point for further malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • 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://honderhotel.com/UploadFiles/FCKeditor/20210827140652.pdf In PDF document text
    • http://precisao.net/files/files/10217383022.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160df3fa48293a---43807369236.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/59212398555.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/3153039836.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/54108111574.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/66183091456.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/8248b4e9e4b775454a78cbd6f8d6581c/latelizakebozoxoluve.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/47614633561.pdfIn PDF document text
    • https://atavio.ru/files/file/nibarawaladasa.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607048eb9d315---71225350666.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/kuvisuxitijukozifuxere.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16111ee26edbbf---mowerutami.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cca71dc8b---zawasuzikozovorez.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/wafapatipipodokosexeriler.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099fc163841f---91056978998.pdfIn PDF document text
    • http://naoshima-habitant.com/84760208230.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e64e54960b37e6679e38f112e8473f14/3346050899.pdfIn PDF document text
    • https://ckmandarin.com/uploads/womatemesefepofiri.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b44b4f12---madasugakemale.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/dasubomejoxugitufepopew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=psalms+for+mercy+and+favourPDF 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_off00013449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13449 20216 bytes
SHA-256: 93f6bf43f4ac02bb67845c7f83198a852ed5b5aea77e54789463267e6e0ff668
font_01_sfnt_off00016807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1801E 10728 bytes
SHA-256: df8d533665a62496f089f41698a2a4a1240854639c5c06e0549de07f63e40bf7

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