Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6f1fb783ada83a…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 03:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 20e7bb4c8f9367383f95ebbb7ce8aab0 SHA-1: 1d2b4595fd3f081273fa9a11813a222f5f8bd3ce SHA-256: bd6f1fb783ada83a34e65b97e3548877e844f0ed83d3f4ff643645e26be5fa3e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to host and distribute malicious files. The 'SE_INVOICE_LURE' heuristic indicates a potential social engineering tactic. Although no scripts were directly extracted, the PDF structure and URL patterns are strongly indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nhachoxebus.com/upload/fck/file/budirojalaxoxoxonuje.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9fe8c556---vexoritalelo.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/32948758882.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf953370a6---45180752641.pdfIn PDF document text
    • http://dzbnf.com/upload/file///32001691060.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/9e859ceec9938a7ac2578319daa2c17c/42779264718.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/poforilux.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/pofaredetalomud.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ad206239---nudin.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3d0926b8---kusakomovigebu.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210608_F07D14DE8745691B.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c574d081586---9599889032.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/78km8p0uheldksgmsldhvs9e01/58151872499.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160865647661fb---gimazijuvegonexupik.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/66770233493.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eef881ffb---xaxalibafiwenupitofapas.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/683363aab8d8ca12a19ede59f7d986ad/96248530148.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/lejojipuwademewuvoxawep.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/metibevikanudoladufakoz.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/d9e8a3d0a69b9cd007ba8f0cf822b214/55940661937.pdfIn PDF document text
    • https://sbufficio.it/file/fokekisezozuzapikatarejef.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f63d0b6a7f83fcb77801a83838750f3b/9255327773.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/navobiwewewaxovugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=samuel+arnold+hey+diddle+diddlePDF 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_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10536 bytes
SHA-256: 79f96b26870a65cf563f27e644fd1aea6596f69727d2d15495a62ea8ea78b427
font_01_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 17628 bytes
SHA-256: 5154eb7d2ee08c75cf21d8cb4f227ec5b769fedea0b970074753ce8f476e817c
font_02_sfnt_off000149fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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