Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfeab7e1ebeeef2b…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 11:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c851a807b9c5bd6463c47edc340a34f SHA-1: 6f85e16f7d58772c8acdadafe8083a933587bf55 SHA-256: bfeab7e1ebeeef2b8afcf4b96d6f143feccaebca6a36a9d75c82862f01d260aa
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains multiple URLs, several of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of a link farm and the nature of the URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://mikllc.mn/uploads/files/zaperafaraf.pdf In PDF document text
    • http://tavaszitura.eu/userfiles/files/baxugasunamogoman.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/kepivopuwanirasazosodasax.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/ridemufofefapev.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/xekadojetiwuxolubobulodud.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/runuwaguzanaveroxozab.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b1220b9a0---66373618326.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2fe44265a27eadcc42c5663f1794c1a7/wuxanevixubararu.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/fibapa.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/84942901572.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/zapoboxiv.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16131277ce2239---34002161350.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef6d664904---53809656740.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/gejewepolufaz.pdfIn PDF document text
    • https://okazionche.com/files/tonesipozejizigo.pdfIn PDF document text
    • http://zamgph.com/uploads/file/251553202122.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/7927861094.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/jifuzakesaladaretuvuma.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1614bad053bcdc---14662950004.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109072109405359.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/80725977958.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/31327583139.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/72822807179.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/53830798653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gun+fu+stickman+2+apkPDF 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_off0000b2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADD 10592 bytes
SHA-256: 123846920b9181b8a27b282f93e4db310f14935ab0c8e423193f0dd9748888a8
font_02_sfnt_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 14820 bytes
SHA-256: cefbf89e64ffef153934743864d16095dc6ab86f7dcbc5e3a06d7517b65912ee