Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205fea118b6c2de…

MALICIOUS

PDF

79.9 KB Created: 2021-09-22 16:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3837fba4c89505b03e195cefe992111 SHA-1: a43dcacec17bd03fb0e18f27dc1f9d907cc4d2d9 SHA-256: 8205fea118b6c2de4a33ee403416f063dbd52c143a934eaf9eaac7e52d39a732
156 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 are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145fe241292c---79938428474.pdf In PDF document text
    • https://megalightgroup.lv/uploads/files/rubadeperiran.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/60522820750.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3ed1f1d26---26415502360.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/bajazenimofakapib.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/zumutuk.pdfIn PDF document text
    • https://akemi.ro/hirek/file/8631434214.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/59486466379.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/51691374622.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/6910220812.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/85762578751.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/wuzamosoluxonisuzis.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/bejuze.pdfIn PDF document text
    • http://sakem.org/userfiles/files/fegimulakajivexalezapelo.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/logebowelozegawejix.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138048dd1a16---jabekananagedawuf.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/vajelekuvitixawutireto.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/lobiduwuxevumanomaxipa.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/39456754914.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/97945961668.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/fufomogurovijabijul.pdfIn PDF document text
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/jofesexupisinifipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=genuine+iphone+giveawayPDF 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_off0000d3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 18008 bytes
SHA-256: 4baf7ebcdd40327db8066fd0df3be1ffa3e5cfa04881e553795b20c7336e3f6d
font_02_sfnt_off00011ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB5 10524 bytes
SHA-256: b7fb8268f4f998b9c04c343fd392b90606c72a3f857a6900b1cbaf8f8bf999ff