Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce73de35cc7cf262…

MALICIOUS

PDF

79.3 KB Created: 2021-04-01 00:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e34479b89a319d5015a831ef14c4cafc SHA-1: d53d2ce3706d494e0ba3d37741ef1876e9c35ea6 SHA-256: ce73de35cc7cf262b45ea30aad6fd1862e2af795142d67f9e2ba72a0930dafbd
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to an 'allowance tracker app for android', aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=allowance+tracker+app+for+android
    • https://static.s123-cdn-static.com/uploads/4410448/normal_5ff30d5922f52.pdf
    • https://cdn-cms.f-static.net/uploads/4374545/normal_60431defb514d.pdf
    • http://workbykoder.xyz/download_adobe_premiere_pro_cs5_free_full_versioncfwzy.pdf
    • https://cdn-cms.f-static.net/uploads/4427077/normal_603e76c1bddee.pdf
    • http://xunetokawetik.sportsontheweb.net/77041998943.pdf
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5feb2cae87f44.pdf
    • http://lofajemami.sportsontheweb.net/15773510521.pdf
    • http://pojokup.getenjoyment.net/doxabarojasa.pdf
    • https://static.s123-cdn-static.com/uploads/4480412/normal_5fdda567c3365.pdf
    • http://wacc-cat.org/judilugovasitezuixtp4.pdf
    • http://fejukoturig.medianewsonline.com/agriculture_information.pdf
    • https://cdn-cms.f-static.net/uploads/4476595/normal_5fe867a2614a1.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_602baa443eaa3.pdf
    • http://tapagigozi.medianewsonline.com/8854358349.pdf
    • http://mapotilij.mygamesonline.org/examples_of_behavioral_interview_questions_for_managers.pdf
    • https://cdn-cms.f-static.net/uploads/4408476/normal_605d398f45585.pdf
    • http://joblanc.xyz/identify_radius_and_diameter_worksheets8md2i.pdf
    • https://cdn-cms.f-static.net/uploads/4454967/normal_60102176c3639.pdf
    • http://connexion-amelii.xyz/25535467885gy3vv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gozifep/8717099829.pdf
    • https://s3.amazonaws.com/suximawo/metal_gear_solid_v_ground_zeroes_guide.pdf
    • https://s3.amazonaws.com/kudufigunabi/links_awakening_switch_review_metacritic.pdf
    • https://s3.amazonaws.com/jasadavebaga/how_to_change_battery_toyota_corolla_2009.pdf
    • http://gamelaluwer.myartsonline.com/65299511031.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_off0000f7b0.bin
94d2e5bec73f4699a1210c4a8c614f6190725d0a1035df1acec1ec2a5e65af9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 5116 bytes
font_01_sfnt_off0001093f.bin
e03ce7479f06dabd12071d1d9e66da21f1c0cb0ffc29bfe46ddc0d68107fb63b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 11308 bytes

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