Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cebd990ba80a912…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 19:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bca390fce7161c86f9f74cf429f7f44a SHA-1: 1c087f88414eed3c7ed5382b1abe635fe3b7db58 SHA-256: 7cebd990ba80a912c598ee35f9cc332b71efb27e6de2fb5f19316db64cbe6e04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests it's a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=hotspot+not+working+on+iphone+11 PDF link annotation
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16131727cb31ee---laleta.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/88657339843.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/gajetuzonuwinifozivavukiz.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/60910213275.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/63846496790.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/devunekiwatiko.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/75622396569.pdfIn PDF document text
    • http://packamate.com/userfiles/wabare.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/20464365626.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/3811566935.pdfIn PDF document text
    • http://medicareclinichowrah.net/faboriginelist-braj/userfiles/file/44437985047.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/46187340884.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/77640600729.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613743d190618---mepamijagit.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/vifosubif.pdfIn PDF document text
    • http://mamitobe.ru/files/file/zomusemafomarewamaj.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/zabalibemitokoxale.pdfIn PDF document text
    • http://wsm.hk/images/files/ralixosijeg.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/muvuruxarazefotadekaxisar.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/xodabobaxoketik.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/zulun.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/repasijuzo.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/741f0004fed161cb84d14d57b1b57175/457803488.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/weviwapojazobinido.pdfIn PDF document text
    • http://khunghinhdepphuctin.com/media/ftp/file/mewinajebavani.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/91616892131.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_off0000d176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD176 17932 bytes
SHA-256: 5d3eb3561d31246e6a55c4f4231983fafe98b9ef8051b8fe820d54761d14dffc
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10544 bytes
SHA-256: 6ab68051767ecfd06d1df0cf2d5c6647cf7efcb00a3c67aebae6488841d568ae
font_02_sfnt_off00011784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11784 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.