Malicious PDF — malware analysis report

Static analysis result for SHA-256 9618ddf9b2be12a5…

MALICIOUS

PDF

84.7 KB Created: 2021-09-22 11:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7572c5bdb224c45f308e62128b6c896 SHA-1: 009f21fa741b86da6b527c375cda33635c8613e0 SHA-256: 9618ddf9b2be12a52272eca6bc63351f4dbeb1ee1e94207ad61fe9a291d14749
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in one URL indicates a potential SEO poisoning or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=mitwa+marathi+full+movie+download+hd+1080p
    • http://eqletstalk.com/uploads/files/202109212111571253.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/5b8bd90e215cc5e63451310d31bc467b/rebowomoxuxize.pdf
    • http://abwsalisbury.com/uploads/files/43874676561.pdf
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/32716558503.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/jatotaxorudawukasezulij.pdf
    • http://doubler-son-capital.com/photos/files/vazasafepuruxirije.pdf
    • http://reylab.com/userfiles/file/mafebifejopuxedifomelusug.pdf
    • http://laiyi-art.com/userfiles/file/91067083721.pdf
    • http://client.diffuse.info/files/46940994809.pdf
    • https://echipamente-scule.ro/userfiles/file/wejod.pdf
    • http://sudeoksa.net/userfiles/file/20210901135927.pdf
    • https://nguyenhungstone.com/uploads/image/files/15240261093.pdf
    • http://gramercygrand.ru/files/file/92837820770.pdf
    • https://consultemergingmarkets.cubsindia.com/files/51580292229.pdf
    • http://fujavietnam.com/images/Download/56809916984.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613852118642f---72136434546.pdf
    • http://rracc.com/file_media/file_image/file/36328033823.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210920070611118.pdf
    • http://kemmurad.com/webroot/img/files/kegimovunovitow.pdf
    • http://addisonplaza.abwingsmd.com/uploads/files/36507264779.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/50298f53a9ca4d86ce39fe3586164927/31223515509.pdf
    • http://www.saito-ken.jp/userdata/file/18761905556.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142426a139eb---samolepam.pdf
    • https://webdatedepot.com/userfiles/file/43844848365.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e2.bin
2624e79ce7bb6dfb761f63f118cde1706c200ae4b0811163548ddc230f3dbfa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 11224 bytes
font_01_sfnt_off0001000a.bin
3c59c855e4eb2927bdb489e95e334c69506692a9aa2719f02dd33949b2945db3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 17120 bytes
font_02_sfnt_off00012c5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5F 16792 bytes