Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b82f3af77ed788…

MALICIOUS

PDF

75.9 KB Created: 2021-04-26 10:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8f20a0a5e7f5c5d7a8dc0dc2e3cd664 SHA-1: 16f2bf976e7e15709784939032645092d6489460 SHA-256: e7b82f3af77ed78841465d9c659e991144dbe2aeab634f92733d4c7ad0dda27c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=the+monk+who+sold+his+ferrari+amazon+india PDF link annotation
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/pevinimalezip_jirijutanuk.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/4e579.pdfIn PDF document text
    • https://tomudonaki.weebly.com/uploads/1/3/4/7/134715401/lenusavenobireja.pdfIn PDF document text
    • http://cafe-cok.ru/1663577191438x42.pdfIn PDF document text
    • http://cuzinfo.ru/11956119439mbka9.pdfIn PDF document text
    • https://cdn.sqhk.co/dobexesi/jehiFRC/everyday_examples_of_absorption_of_light.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/1113893.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/ajcg1ji/46690355587.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/jbsmgaO/57972325317.pdfIn PDF document text
    • http://giocodigital.website/pimekejemuwafepoz5ax9f.pdfIn PDF document text
    • https://jewotefajasofu.weebly.com/uploads/1/3/2/7/132741420/55a3d2b58e3.pdfIn PDF document text
    • http://skout.tech/modul_akuntansi_keuangan_menengah86rzy.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/nuwolu.pdfIn PDF document text
    • https://vonuxunip.weebly.com/uploads/1/3/4/3/134377821/makisimojakek.pdfIn PDF document text
    • https://kipidabivipili.weebly.com/uploads/1/3/4/3/134340994/seruxip-vutudonozop.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/fapakelulopa.pdfIn PDF document text
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/jijafakev_digojukudowulew.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/g4sAage/98883245438.pdfIn PDF document text
    • http://cocobuka3.xyz/do_i_need_to_make_an_appointment_to_renew_my_drivers_licensetgy7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07919539-bb46-4bb6-bc9b-cf75aab14aa8/saint_augustine_confessions_henry_chadwick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a90b1f1-7457-4c2c-b163-ff99cb4f9e5c/belenelexenibadejaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f893132-e9d3-4000-8bcc-0b11b72151c8/82499457835.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 5300 bytes
SHA-256: f4665dd98c9ab1daf5043b5ceaf959694147f27d9efb8e870db7d4522a6ee512
font_01_sfnt_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 12068 bytes
SHA-256: b73fe4285e1afdeb58c15572614f7195b9580e66edd42c01823ca712304faf93

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