Malicious PDF — malware analysis report

Static analysis result for SHA-256 204bf9530f2aedc8…

MALICIOUS

PDF

76.1 KB Created: 2021-09-16 22:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50f4c5906e638cfff89d2098a32e53a9 SHA-1: f52bf26c26dd58a6e7f67aa68dbc87fa9b81b366 SHA-256: 204bf9530f2aedc80c9ba04c1dcbdbf32bb9d24d7930a58f56a5b019fc783003
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm, suggesting it's designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://philabc.ru/uplcv?utm_term=how+to+convert+video+to+mp3+on+mac PDF link annotation
    • http://apart1day.ru/file/vodosaviwun.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/47637851721.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/lezaliraxixaxekavijat.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613246a37e3ba---zixifefujuzenimetizeri.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/14999901984.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16136822dc76e6---9207536598.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/dutexaravapimeziwo.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/66463424791.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/92425317913.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/52042638861.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/razuvitulukojapedobamuj.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210903_3609FAC92FCE361D.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/fumowejifupupalogotogibu.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pnoii1kbfrkgdbsoe877s7n6kp/76987193963.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/2237067824.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/vilusopozaposiroxisasetub.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b91baad6de---zusilexosetomelubudujuk.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/jukowirijajagigofijixe.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/20126060619.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/160951266735.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/52814067432.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/pemukusebinotowigin.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/50724966237.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/gisevolebolerubafenopolib.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_off0000c6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 16548 bytes
SHA-256: 5ae7fac3851aa53b81dbdc1c22a1874a94ff66aa90a82579deca9e61d49f0108
font_02_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 10776 bytes
SHA-256: 7a48c134a81f81831142d90f11922ccc8628ee40720c46be6a6a820c749dd269

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