Malicious PDF — malware analysis report

Static analysis result for SHA-256 004bf5bc5f62fda4…

MALICIOUS

PDF

120.8 KB Created: 2021-09-04 08:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: cb0219c3e2a1ef797ed1f5288132291e SHA-1: 85610d30fb440412bcdc6fd783a77a1c9716965a SHA-256: 004bf5bc5f62fda41fc78fb7c498bbaa0d59f9bb2acda02b865cc44df976b4f5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS uploads and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate a malicious link distribution pattern.

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 http://esipro.be/userfiles/file/dusadekuwa.pdf In PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/7262972030.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6cff869b1---15137617007.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/231f1cqk3uf5cme1115fh0ouph/pomeru.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/bozimefosi.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/6aec3a29ad12080420819922493fb353/bopupedobikuxofugujawowan.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/32609441515.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6f03fbd5---levuduwupezurotine.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f405e2114f6---fivavugokeletadupidotiw.pdfIn PDF document text
    • http://banquat.com/userfiles/files/64842946328.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/38690252892.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/lulajukawonaturala.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/ranisi.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/87190885166.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/retufomunetakuxowowel.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/871b4fe7e31e6165a33f46ec63611bb2/tujixunebape.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/budevovabog.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/55101982310.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/b0012b1f22040290847b5054c5bc5b59/1157659572.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd93361659---35319441536.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/pixusivulutimusimujuduvud.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/wuwixujir.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/40621746306.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021081520174173499.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/76136648589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=tata+group+csr+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_off000174bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174BB 10484 bytes
SHA-256: 1c0180589bcb6cf0ec31beb865be5419d8dcf648c981efee904c48aed1149953
font_01_sfnt_off00018c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C7C 18864 bytes
SHA-256: 7ddb6456ad8ee894cb867034eb970e5a6060d9575a654c11e4994d8807d1f8c1
font_02_sfnt_off0001bd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1