Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6cc42324a98c48…

MALICIOUS

PDF

111.6 KB Created: 2021-09-13 03:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 925275b93cd02b28c6304cf613bf8a4f SHA-1: b6c543243456dc24946b61d2207a655733651a70 SHA-256: fc6cc42324a98c485e2f61f2c92b9252a5546c74dbfb06179aefa76a61d44cf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF format itself often leverage JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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://pistant.ru/uplcv?utm_term=craftworld+codex+8th+edition+pdf PDF link annotation
    • http://cross-winds.in/upload/contents/images/images/87525703049.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/27987806846.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/49647063166.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/nasaxomibojuxodag.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1630523877.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/76689240192.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/56445244500.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109020915517364.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xitixijudasiluxevixivoli.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/vevevigogid.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/xesakoropijeleso.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/vunevaralegibijuli.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/zumuvag.pdfIn PDF document text
    • http://www.520amis.com/upload/files/60762876549.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/873ea80265dbcc1bd2989e80b42c5f43/wozegatavufudogupiv.pdfIn PDF document text
    • http://budropol.de/Upload/file/72157842825.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/miniximogapuwujokotumoz.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16133f8c8e71a6---11265398439.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/pezim.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/1906437743.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c3f03852c591c3475c0ab3f18bd6ffa7/72430933258.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/35376167562.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/torineratorivobupazawut.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/rufed.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/sejiju.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/94245f3a41f04088d6ae83df5b1778db/bunul.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/17485293516134ebd0dcef3.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_off00014a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1623C 19884 bytes
SHA-256: ee2f86d2d071fcb40a653a3e4cb5bfe9cc04f76a5aa350d766adfa4fbc7b8b79
font_02_sfnt_off0001969f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1969F 10976 bytes
SHA-256: 488198420d454b68f81b88bade459084b2ec4f21522e74f73e640bb6af899a37