Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ea074a0b8274f3…

MALICIOUS

PDF

69.6 KB Created: 2021-09-27 06:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b24c3f32e2c878ea5f31d084f8bf678e SHA-1: bd17c94abcab1f964f41202ea6e03d5b561b0e0a SHA-256: f2ea074a0b8274f309659059a89665bc9a2a8c45fd567e2924fdcff0088ae3d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URIs, including one pointing to 'infrive.ru', which is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links on disposable domains, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://infrive.ru/uplcv?utm_term=comparatives+and+superlatives+games+pdf PDF link annotation
    • http://jungam21.com/upfiles/file/1631030387.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/keviku.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/fupejovenilato.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/08/files/210831221227.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/batowop.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/39663217216.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/78694818171.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/81945974347.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/99938948676.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/betafupalopunovulazede.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/59184127362.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/62625816961.pdfIn PDF document text
    • http://buddhavihara.net/userfiles/file/vuzuwolobo.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/danifejugigeso.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/xusufidapuxelox.pdfIn PDF document text
    • https://vpmemorial.net/images/file/sojegumabogivexar.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-3/20210903080807561942.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/44516293226.pdfIn PDF document text
    • https://istanajp.net/contents/files/71944914957.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/ratag.pdfIn PDF document text
    • http://skncn.com/u/files/73691717395.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/mekosar.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150587a09026---82082096202.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/wimise.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_off0000b17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17D 14888 bytes
SHA-256: fe4bf5fea747292223e329368dd9884ce86c9f8529f507d9c66852d860282bd6
font_01_sfnt_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 11036 bytes
SHA-256: c5991bb2eb9269b23f2a43f0b36cb6e6e532d7f69edb7947b0ab3ea10ee4535d
font_02_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.