Malicious PDF — malware analysis report

Static analysis result for SHA-256 895208b740b8eea6…

MALICIOUS

PDF

74.9 KB Created: 2021-09-04 12:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 24b6df76fed25dc19ae67b0ef8d96551 SHA-1: a5af04f1cff069bf3275fd50593965188a211215 SHA-256: 895208b740b8eea6d2c1d690f05e8ae4adde52258983009a7b4e647d1d4df854
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains or compromised WordPress installations, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious further supports its harmful nature. Although no scripts were explicitly extracted, the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=editor+pdf+gratis+windows+xp PDF link annotation
    • http://canphantich.net/Images_upload/files/wamavutatuvanaxawirizer.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/283678024.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/jajetobebadigazejisav.pdfIn PDF document text
    • https://shibbirs.com/media/files/77911107074.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/aa3cda45d780e1d5ca0f8861218b872a/simufarisezurujumo.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/kusuvuke.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210620065947_o4ylhm.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/73233323279.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/sozuju.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a3466064ad2---29174090868.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160ec96f6daeb6---nujajuxofabusosusamelul.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/bowijulope.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/gire5k6of5eii57vpmei9eam1f/jafaza.pdfIn PDF document text
    • https://maviet.vn/upload/files/defozogopagotizini.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160824b7d60510---vuwegadolugisovedegi.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed87ce38bf---wikawuxidavulamuken.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/birivekatapoxezifokedi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607920c9e472d---17200462291.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c1c9051ce2bd02324a05d8805c892905/70696291867.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/82155960738.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4acf63dc79b6dc9b3fdec5ea1c0777b5/53142561047.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/wipemuwuk.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/larafojivenasefobofu.pdfIn PDF document text
    • http://fotossc.pl/_files/file/41128860912.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/45902469309.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/sirigadu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 18692 bytes
SHA-256: f57a79d590ecfe011642ca61e86bbf837750d01998fb8fa61c8d5acb47d29dfd
font_01_sfnt_off000106bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1