Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bde440a60d2917c…

MALICIOUS

PDF

115.9 KB Created: 2021-03-15 08:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c28b790f8c25a02be243aa82b154466 SHA-1: 6e9f1d776701a6f011d0cdcfb578aaeda1d7972d SHA-256: 7bde440a60d2917c915331358905e0dbed2127685f68645ce8de9720dcf78471
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Maus 1 quotes'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=maus+1+quotes
    • http://viniveba.mywebcommunity.org/longman_academic_writing_series_3.pdf
    • http://kojazunupetip.mygamesonline.org/bebojaraperudi.pdf
    • http://pifofobexaxel.mypressonline.com/84744193563.pdf
    • http://onlinetiser.website/mizepopepuwojutini8vgeu.pdf
    • https://cdn.sqhk.co/jofutagi/qhe43jf/don_t_touch_the_spikes_online.pdf
    • http://tajuliwelofiti.medianewsonline.com/nautical_almanac_2020_download.pdf
    • https://cdn.sqhk.co/girolivudafo/icjhhhj/vufelejajativatuk.pdf
    • http://naturebiolog.fun/aluminum_extrusion_design_manualdeyjd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/48d02c05-2422-46b2-bd80-aabc9ebab66c/17946890447.pdf
    • https://s3.amazonaws.com/mexesazaxasa/animeland_dubbed_anime.pdf
    • https://s3.amazonaws.com/bidurudilidujug/xamig.pdf
    • https://s3.amazonaws.com/lorifumofelu/gentex_fire_alarm_manual.pdf
    • https://s3.amazonaws.com/towutoginadivu/best_all_season_tires_2018_consumer_reports.pdf
    • https://uploads.strikinglycdn.com/files/b768dc42-f509-444f-a7a1-c022fdf8be5b/vitovato.pdf
    • https://s3.amazonaws.com/figugipopar/bootstrap_4_personal_website_template.pdf
    • https://s3.amazonaws.com/zifozujiwi/jovixukebiwab.pdf
    • https://s3.amazonaws.com/nevowimo/43039249861.pdf
    • https://uploads.strikinglycdn.com/files/2d13fd95-02d9-45b3-8bc8-b3b67da47291/dorian_gray_penny_dreadful_gay.pdf
    • https://s3.amazonaws.com/xafaxotaful/how_to_connect_sony_mdr-xb650bt_to_laptop_windows_7.pdf
    • https://s3.amazonaws.com/jupudizadid/jotudisidedetupumonuzu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018722.bin
1b83d131c3a84b20ed46e8b0216535ea8929cc0237f26a40093a970414cd5621
pdf-font-stream PDF embedded font (sfnt) at offset 0x18722 4736 bytes
font_01_sfnt_off00019764.bin
e036249ffed1f10674a7ab758fd3723c82bc21b44f19d58dd753d5e6f80a800c
pdf-font-stream PDF embedded font (sfnt) at offset 0x19764 13420 bytes