Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdd8923a13656b2…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 23:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48601a4f1288c93462e6c7a17b32d579 SHA-1: 072801ca5ec9df1d3cc610e950402b0a8cd0c201 SHA-256: bfdd8923a13656b20430fdfbc10dabc0efc38489315a27d9657e120b6d2ea58d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. Heuristics indicate a link farm designed to mislead users, with ClamAV and ML classifiers strongly flagging it as malicious phishing content. The embedded JavaScript likely facilitates the download or redirection to a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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 http://marklaliberte.com/fckupload/file/85985717182.pdf In PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/dinufeto.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/vizetezamikadijunuz.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/60348328970.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/figilalolanodajudisegeke.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/44123007509.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/75847204473.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/maberibezemorupeviwuzex.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414fb6dc060---54220174701.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/jedinuge.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/6252015848.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/78191244561.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/79587747821.pdfIn PDF document text
    • https://securitydm.net/slicice/file/nagetavaxa.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a18e02422e---jexozazazumabilifuj.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0c0ad681c---54032757669.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/80333893801.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8b3055fcc---34995921412.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/12944700556.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/kifaruzefufadebad.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/gorojeb.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/fopuginenapori.pdfIn PDF document text
    • http://placc.info/up_image/kategutajer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=download+aplikasi+pelacak+nomor+hp+untuk+androidPDF 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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 16564 bytes
SHA-256: 3dd2346626182d8751917d840afc81e9855b0da71ca339e2b7544e0366d18210
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0E 11060 bytes
SHA-256: 05f4be8e79c0dc6325d6559d5ae8168f4712d4a8a584e28d41fe77b5fe3138e6

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