Malicious PDF — malware analysis report

Static analysis result for SHA-256 97574002e2c52eee…

MALICIOUS

PDF

77.6 KB Created: 2021-09-12 06:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6b13464f43124f227a9dd423d2422442 SHA-1: e4c6f359d71647d6411c543477a5f96ec5dee567 SHA-256: 97574002e2c52eeee5c50ca4b95ea6ff385d00c98a3283e4c33d5e423606cc90
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to suspicious PDF files hosted on potentially disposable domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the overall structure point towards an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dienvietbac.com/uploads/files/baniberatavolovajufug.pdf In PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/32775898103.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326a9bd288b---52948959913.pdfIn PDF document text
    • http://daiquangsico.com/img_duhoc/files/72309998245.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/15186332458.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vonuki.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/nokixiwubovuwipur.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/butakepovozosuwod.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/jutimuri.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/buxadozavisoxovos.pdfIn PDF document text
    • https://magerp.org/upload/files/11580137955.pdfIn PDF document text
    • http://yibetter.com/data/files/xizutosejewex.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/79412644850.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/dajutimexipiwegu.pdfIn PDF document text
    • http://scro.ru/pic/file/43037820837.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/kejowabibebi.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/64328960999.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/26892342870.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/wutijobudogabo.pdfIn PDF document text
    • https://palet-school.com/files/files/romazevetofu.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/zonexoxet.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/jebojodivamenatanategiw.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/pufarodarakekupebakut.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/razejufofilorole.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/besesemesuv.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021090908490573499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=live+cricket+online+tvPDF 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_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 17712 bytes
SHA-256: 59da878cb3f45f72c51f3449a638f418b1fec9b213bcdf372dae9644a1533a75
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10008 bytes
SHA-256: 455880bfcb740640955bb908ad2fe1fc15208218595311a23fddfa056046691c
font_02_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1