Malicious PDF — malware analysis report

Static analysis result for SHA-256 2960f68056b1bf0f…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 15:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4fa5018d300eda1651baeff3ccaf0c7e SHA-1: f1dc486695d512bd4cd8b85bfd65fecf13c0f6c4 SHA-256: 2960f68056b1bf0fbd80e910893e8e13063bef71ce468c38d978c34110a7e960
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous external links, including those on potentially compromised sites, suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jaluzipro.ru/public/userfiles/file/90297670464.pdf In PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/robira.pdfIn PDF document text
    • http://millecolori.it/images/file/rozabafev.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/90240358379.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3fh2rc1gluvksd9sgptak45oj5/mutenesopo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/3o02urs5tmi252ja8imgujc5j4/16447396598.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/febakefelidakalarobadi.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/53910510499.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614047bd9f24d---tuxikozenezaxubix.pdfIn PDF document text
    • http://cissi.it/userfiles/files/pufujupuwunemelavopobu.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161444fd6a6353---dufakudege.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/wusiwidarepinevubo.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/gubudetun.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/vunenazetur.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/69771764493.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/roxelotupimuruverovebeda.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/14882804760.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/borurudowu.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/8650205694.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/limunagozetudegatonuse.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/retow.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/noranenetabovosexat.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/modesotubozisesugitipenuk.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/e2pqk6r46t4m7aa81803kel3c2/59750915251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hiragana+katakana+practice+sheets+pdfPDF 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_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 21412 bytes
SHA-256: f2fe2da1a47cbd420fbc448d1c970b5e7d70ebc4d608badff2454cdc59902704
font_01_sfnt_off00011095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AC 10816 bytes
SHA-256: c1f20dffa43823fdd3ebc584354b404bf536ff031ab939935a2c19cbe760f42d