Malicious PDF — malware analysis report

Static analysis result for SHA-256 720e17dac85d7eb6…

MALICIOUS

PDF

85.7 KB Created: 2021-09-10 17:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b48083337008eb6e4285920ee5ef3833 SHA-1: ba697b6325cf60ce75711286fd4c7e18afb38999 SHA-256: 720e17dac85d7eb6d0352d5df9f1fbe002f4689d170187920cee701e40861c92
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs and a heuristic firing for a QR code lure, suggesting it directs users to potentially harmful external sites. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://kashima.cc/userfiles/file/33150236073.pdf In PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/xegaxojojivinilan.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/54800493583.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/56759236677.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/35051157791.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/paderi.pdfIn PDF document text
    • http://chinahongji.com/d/files/49911265983.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/vofominosegidenamaf.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/39503937717.pdfIn PDF document text
    • http://theponghop.com/upload/files/23629503917.pdfIn PDF document text
    • https://longhoang.vn/upload/files/befukuke.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/mafagelegazadabajit.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/93649456249.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/poxokilaromojawega.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15408753475.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109082248023906.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/46970069004.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/lujorotugunaf.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210902031717.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/petadoduk.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/71404515430.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/dawujejid.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/zizutevazerolezopedof.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/fegutu.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137babe5707f---97764895599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=qr+code+creator+free+downloadPDF 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_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 10356 bytes
SHA-256: 516a3e2c1fbfc103d260ff1bb9bf99325bf2978e4c871ce83df1d4bd6d8f1594
font_01_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 18228 bytes
SHA-256: 7b7b3edcaa8480dbb034b8de89e552f6dd087a966a91081a0ad62df20df95527
font_02_sfnt_off0001311f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1