Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d5911fdeb431cb…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 05:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c2900194f5f01d300d952ace8c7a5fdc SHA-1: 251b9c37882104eb7ea7ef9bf81016a9b92c3f0c SHA-256: 94d5911fdeb431cb7752d650dc237f983a83ab0c8764a052180103e167df651d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised CMS uploads and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The presence of these link farms and the overall detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=where+is+trash+on+android PDF link annotation
    • http://boissee.fr/userfiles/file/50942833436.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/ragaletegesunobulabon.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/xigejere.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161327c03aa55a---47998979032.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ft1t87aeoin6e0t2aln2hsldjl/21457376822.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/030322302165.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/rimaf.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/vokazegat.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/49677546085.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/joxikuduluruvadufu.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/zavulate.pdfIn PDF document text
    • http://www.ezmoving.com/file/sexakikexujetoguvulamaki.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/79122240332.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/jewalawuvelumito.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/87706741196.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/lovixemoli.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/88709358061.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/24598420506.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/xesumiwigutitaxaxe.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///gekimututot.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b710606c91---pedamenevemufesemawotem.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/30465187935.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135f883a314b---lavenuzugofadegirilexore.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/79739644604.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_off0000d6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F0 17924 bytes
SHA-256: 08a87d90fc19c9925641eeda78196208783ae43f17a5883e9f1fec79706e088f
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 10292 bytes
SHA-256: fe58529b1baeaf51d1886bc1624e6885560e7dc0c527e51ef0b9c155a8e771c2
font_02_sfnt_off00011cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1