Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c49c9a838943cc6…

MALICIOUS

PDF

72.5 KB Created: 2021-09-05 02:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7840c6fc7816306b464dd329d6399359 SHA-1: cd0e26c34a99a30c6b54d6e7571ba6b9567b27f4 SHA-256: 2c49c9a838943cc6db0206582027736779c628336f2f5ca3b0825a4c043c8ed0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://guchenes.com/d/files/tegezuv.pdf In PDF document text
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/42919438108.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16102c7d114444---98728166658.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/425169e6171e3cfc7329b4d4b801ed2a/66115257230.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/7531416336.pdfIn PDF document text
    • http://chieucoingason.vn/files/90701788390.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92103863150.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/35059760432.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd4cbab645---paxibuvowiwulunupinepazax.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/99944427818.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a619f9e0a77---vomarinin.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/tanalerobiganufin.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/prt1bam996gdkmso1fv3lunmq8/fagogi.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/35923491013.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4af0b6f9da---tolagexesifopiwatanuzobin.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f0dd9d07ad399a8f155e310f446abeca/4483454378.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7f03d6916c1c4c0df38232e236b58f6c/51039672049.pdfIn PDF document text
    • https://anjingliar.com/contents//files/91039311667.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/34392349ae2ded8fd0c4c76858f1f943/puzepivitapejuwoli.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/e0f391a77ae0b1421003f0aab4089579/26256529507.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/sorurivavik.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080124ceaa00---sawagimasebalodulinulosav.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a258dd319cf---36494904106.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/10435321763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=servo+motor+pdf+filePDF 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_off0000bc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 10368 bytes
SHA-256: 2c13cd7aba4c4399b3b850230863ab439ddc6fa9d1ffab2fbad5d7097ae67795
font_02_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 15920 bytes
SHA-256: 5eadf1713f4502956fea615da198bc74003de5ef8118ea0a8a7545394dd35f44

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