Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fdbe77468b3c69…

MALICIOUS

PDF

105.5 KB Created: 2021-09-09 10:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93b54c466341c149364eb3ea341a09d5 SHA-1: b292bd21ba64fe67751c61bf1fbf0115b6fe5086 SHA-256: f6fdbe77468b3c69cd4c358dde5a7fabef83364517be0a394577299ac3de0b94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with several pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://cozycornerexpress.com/uploads/files/fumadowuxurit.pdf In PDF document text
    • https://texigo.tw/upfile/files/2021/09/02/lirosokibitigumedum.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312595093ce---xelimenemasodes.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/mezamaxid.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/92761026122.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/96404760374.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/fubumorefosir.pdfIn PDF document text
    • http://dytac.hk/userfiles/41865051774.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sesezimurosumetefipupasij.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/11233077612.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/93201374640.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/97127863055.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/zuwezobubij.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/34745065660.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/d43977727a9baeb1d3a5da8047e77742.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/4ur9hj8fbpqd0h0dl9kjfh5tu8/43004570426.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/80480412992.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/47836432152.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/68113671593.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/pibeni.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/bepotonib.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/zurezufoxuzisofibumeda.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/76459100521.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/25794688668.pdfIn PDF document text
    • https://preciseenergygroup.com/media/fexavewarozumixoxo.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210906012002.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346d06b159c---17999831089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=fullmobilemovies+com+bollywood+moviesPDF 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_off0001245c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245C 17808 bytes
SHA-256: b3e92adebf6d0b64de0216022a67da52a03f09eeea6dd1e3ab48685173438e95
font_01_sfnt_off000152a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A0 17808 bytes
SHA-256: 175e23a8461b575005075ad4828bc63a7edd443436c23136482e94f4852b08c9
font_02_sfnt_off000180fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1