Malicious PDF — malware analysis report

Static analysis result for SHA-256 75afd6341dbbce4d…

MALICIOUS

PDF

81.5 KB Created: 2021-03-19 18:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b52a209b97d7574e60aa62edaf158c SHA-1: d88de1b6dc52938b59c2bb548e528ea4c43cdc6b SHA-256: 75afd6341dbbce4d2b030595cbd7b628dfcfc11a37e97e4c969ef5ba6654a3c1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://golowaki.ru/wix?keyword=clash+of+magic+apk+download+latest+version
    • http://joritirumag.mypressonline.com/torah_holy_book_in_english.pdf
    • http://badgesverified.com/basic_security_testing_with_kali_linux_1xc7cx.pdf
    • http://becloud.website/nuvosudaxamifor95c2.pdf
    • http://nibelv.xyz/rerizavumixajusemerimivukdkph.pdf
    • http://wedevaz.sportsontheweb.net/ros_and_guil_are_dead.pdf
    • http://gvidilon.ru/oracle_12c_sql_performance_tuning_guideodk3u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_8fbe9e9033274c91ac251a072a583c9d.pdf?index=true
    • https://s3.amazonaws.com/ganubatebedoxez/6th_grade_worksheets_with_answer_key.pdf
    • https://s3.amazonaws.com/vavabi/tozaserapoxofovazakezeki.pdf
    • http://leparitupoxow.onlinewebshop.net/paracetamol_aines.pdf
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_ea6a530e314644e2b4257f351982bd3c.pdf?index=true
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_4c337218232f4cda9a118f494285212f.pdf?index=true
    • https://s3.amazonaws.com/patilawasu/silabusewefid.pdf
    • http://ropupifalapoges.atwebpages.com/nutricin_parenteral_pediatrica.pdf
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_c5fb9b452c554557be5f4c4fcc06df79.pdf?index=true
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_f8663c1221d14283b46a36947c49f8ad.pdf?index=true
    • 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_off0000fcf0.bin
6481ace3a61502ba4be02227870be6994b443c1e63b43abdbe660fc0921c45da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 5688 bytes
font_01_sfnt_off0001103b.bin
1405a6f6a89d2979420e3d10d151d97026b8050dc56ec0207fb0ec45f97c4fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1103B 11424 bytes

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