Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8123229b6f142b…

MALICIOUS

PDF

74.2 KB Created: 2021-02-25 19:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 21dced95ab6df197c6ffe1acd7d82301 SHA-1: 145690db32929c11921e6fea3b4a95b458429910 SHA-256: cc8123229b6f142bc986c60ed83e409cc6202b10b7c3c6f2e519d990f02227a9
126 Risk Score

Malware Insights

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

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 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=i9100+charging+ways PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fd18244b7ce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_601e41dcf368e.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/jIighje/hampton_lake_bluffton_south_carolina_real_estate.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/jhpesha/gba_emulator_mac_os_high_sierra.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/IVcmhh9/imagine_dragons_diamonds_and_rings.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/giPgeHg/charlottesville_park_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/ozTgdjf/driving_car_with_no_oil_pressure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366965/normal_5fe3d8cb7f4cf.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/fixabotubij.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/gGztJjj/roku_premiere_canada_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fc602f78e136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pariwexeral.epizy.com/adjectives_worksheet_grade_3.pdfIn PDF document text
    • http://navezep.epizy.com/71744524804.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/83765007884.pdfIn PDF document text
    • http://teraropabu.epizy.com/17746152741.pdfIn PDF document text
    • http://dazimosanugep.epizy.com/yamla_pagla_deewana_3_video_song.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/javume.pdfIn PDF document text
    • http://nufolupi.epizy.com/22135912776.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/dominos_cheese_burst_pizza_recipe_video.pdfIn PDF document text
    • http://sadedegigagivaw.rf.gd/7852339267.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/32568590812.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_off0000e5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FF 5508 bytes
SHA-256: 9d5756cc9d24d2a8a80d8aecbe68b624edbaaae8a6d2c2602c8914d7e6437894
font_01_sfnt_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 10288 bytes
SHA-256: b2c3168f32cef72f0f45702e94c0513f188e73aea3cc2c6159965c3b3bbfdce4