Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fedd6e346118bff…

MALICIOUS

PDF

91.3 KB Created: 2021-07-05 22:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6acb8a3b2ab6b4db9cb24e17d38c2a9b SHA-1: 4588a3847b203612a5913f735136c8f10c896105 SHA-256: 9fedd6e346118bff113cadffbdb06b3a30f7834c5bd9bd2ca0afb98bd9992db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF format and the presence of external links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wildpflanzen-planung.de/file/zesedomoxibatolagalakino.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2d6970cfe---xadopalonunugikixe.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ouspseupku5eq462uamklo6cl6/67158477839.pdf
    • https://fa-vietnam.com/webroot/img/files/jasomunirojebo.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160df7d09aa55b---ribezokegabodam.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/60mkolf20dkpg93rapau0p7b40/5885152832.pdf
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/xawox.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160825ce0ed7e4---rekojanimesewewumixananot.pdf
    • https://bloomland.com/sites/bloomland.com/files/vinaga.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/jizifalir.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a7e4cfd46---tuletaxufisetelozilolupo.pdf
    • https://xn--fct8ml6mwue.tw/uploads/files/ludigukemedofanole.pdf
    • https://arrayamed.com/userfiles/file/kikixemopogolozixoki.pdf
    • http://nowyhotelik.pl/userfiles/file/61246614144.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/85njaqmovi21dmj26if4bujr9g/2015654640.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c226b06fc90---dirawemalusukitilasexijuz.pdf
    • http://www.aadhar-interior.com/userfiles/file/27332450521.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160acac0ead0e8---27402321343.pdf
    • http://www.anjhimayath.com/upload/file/juzewa.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5bcf6df15---lulerafejuneraxaxuf.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b890033fe00---sopuwotizibuj.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/947af9fb51527d039dfa3ef4998ce9b3/lutigipig.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871934bbe39---46467681445.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=speech+pdf+android
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103f4.bin
466cc40ace40bcb89541d0095f70ea1b84334e79de805ab8233da3b0e4a3baa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 10480 bytes
font_01_sfnt_off00011bae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAE 16792 bytes
font_02_sfnt_off000133c0.bin
2a70a96195488b9f3e7c88265a630d0e0ccc5c7506709a850d17a14648964ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C0 17168 bytes