Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48213de06d86da6…

MALICIOUS

PDF

75.3 KB Created: 2021-02-10 15:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ddb8fbe4cdaa637ab0ab1dc3ea069d03 SHA-1: 9692da3c2cd5a2e0ffd636a7ed4d188dec1a6beb SHA-256: c48213de06d86da6f4f3ab8ccfd7f4269dd96e93cc90b5a87b4632c39d6f8e65
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains numerous embedded URLs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm designed to manipulate search engine results, likely to direct users to malicious sites. The document body, though heavily obfuscated, contains text related to graphing functions, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wb?keyword=graphing%20piecewise%20functions%20worksheet%20with%20answers PDF link annotation
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/5634193.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/fawew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_600b148d5d9ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fd3cdcd7e505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5ff302cc1eb18.pdfIn PDF document text
    • http://kulokozataxat.22web.org/word_search_bullying_vocabulary_answers.pdfIn PDF document text
    • https://vofesoxofibebup.weebly.com/uploads/1/3/4/9/134900141/susolepelaro.pdfIn PDF document text
    • http://nunokitatamipo.22web.org/juvogabigisiruminaluziw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/5977425571.pdfIn PDF document text
    • http://mujujum.epizy.com/hangouts_app_on_android_devices.pdfIn PDF document text
    • http://tojederetesez.epizy.com/48127361918.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/brawl_stars_hack_apk_unlimited_gems.pdfIn PDF document text
    • http://kesekerezox.epizy.com/arne_jacobsen_station_alarm_clock_manual.pdfIn PDF document text
    • http://gedanenek.epizy.com/answer_me_today_in_spanish.pdfIn PDF document text
    • http://sirowozikuko.epizy.com/romamijipizubiwiz.pdfIn PDF document text
    • http://maboduxivugiv.rf.gd/iso_file_to_bootable_dvd_software.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/age_of_wonders_3_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/24111760647.pdfIn PDF document text
    • http://gumofiwulova.epizy.com/seven_little_words_answers_may_24.pdfIn PDF document text
    • http://wikatamuk.rf.gd/52527160978.pdfIn PDF document text
    • http://terefikug.epizy.com/atitlan_powerpoint_presentation_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 5312 bytes
SHA-256: 215e0a449df4ac74b71ac2c8d88e2bb8d9b05c75ec81c276e4ff1599cd08e0e4
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10596 bytes
SHA-256: 9d9a6d21fe0baf1bb2b5e4eecafbb73831df0a8f76728e3868699a0f6f1fe56e
font_02_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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