Malicious PDF — malware analysis report

Static analysis result for SHA-256 093f1475da74364e…

MALICIOUS

PDF

100.8 KB Created: 2021-08-13 11:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 87fb7557e515521afb806e17ae0a1ede SHA-1: 8a8f7c9b45e4046649043c097e6b60e845a75a37 SHA-256: 093f1475da74364eb48e54ecf7bd1f1422cdcbf2e2ec069cd4143fc55738e6d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are used to host further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 https://inwebjor.ru/uplcv?utm_term=que+diferencia+hay+entre+transporte+activo+y+pasivo+en+biologia PDF link annotation
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/a1ea71a9686ae7d79ff591e2eca084ec/rumobufoverinomovaluxak.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5de19e83---wilisedebozawoxedimemi.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/kutogini.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc800460fb---98657636984.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021080405295858048.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/1cirjaee7cdvprv6e8mufrcvf5/7709798468.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/42n45bqmcloq4dvti6a47s0p4s/kogefabizupegujudavojek.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b3e7c6016---zuzivemafidulobamuriwiki.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/13387731827.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/72933128724.pdfIn PDF document text
    • https://norservis.com/files/files/99601190854.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/mowadezonuxudugifu.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/rukabitojova.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada501e1e7---27794494497.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16088e1b625bce---josetoxewopogirazojazuwuw.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/puzabipelaxixupuforumagas.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/c62045f6de562a9f40a3538478cd1965/zogobudoxe.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/hpc7rjbaceb6m4of9eb0glhe63/jibatugeropezipopitonilup.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f5fb1e4b2d6726f5c1f7e3ab4c859182/mutozedasiperiraja.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/merenujifapobidakut.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6b43b3579ebef823fade201ba00ad237/90858900897.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109ac46d708c---dowusagikifixumope.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/lijaxofubidufakosifebek.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/73209740311.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1bd9acd38b82965e14b8fbe26bc51017/48151948798.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fab918b23---15315867385.pdfIn PDF document text
    • 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_off0001216d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001397f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397F 18296 bytes
SHA-256: 8a4619b53d7af4ddc082b2d33f2d93f06ef05fbadd7c5d4e7b79ea8e5017aaea
font_02_sfnt_off00016784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16784 11380 bytes
SHA-256: dfbe36c7908fe9de5a2eba97e2f7f9857303c1366008457d1c75304e4bcc8c02

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