Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db0a2d9c7761b5b…

MALICIOUS

PDF

68.0 KB Created: 2021-04-08 04:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60c9cca457bc542f9b3f44e318bbbf7b SHA-1: bddc0859f63c63d7f6ead88fd6d2aead8f71394d SHA-256: 3db0a2d9c7761b5b8a23ca3b7e62718323ea80fb9e3b7291cfe8bb9a789ce94e
104 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 multiple embedded URLs, one of which is associated with a download lure. The presence of these elements strongly suggests an attempt to trick the user into downloading a secondary payload, likely a trojan or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=buen+viaje+level+1
    • https://cdn.sqhk.co/supesuvepo/hfif5VX/gun_idle_mod_apk_latest_version.pdf
    • http://max-lifting.store/arduino_mega_vs_unofcw0d.pdf
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/vererifawowixawa.pdf
    • https://cdn.sqhk.co/temejikowewa/jjfyibX/basketball_swipe_an_addictive_basketball_games_unblocked.pdf
    • https://cdn.sqhk.co/setupemup/ghOhdjg/addition_worksheets_without_regrouping_3_digit.pdf
    • https://sudiduku.weebly.com/uploads/1/3/1/4/131452825/vusivorepud-pubegam-loxazexewugi.pdf
    • http://fesotisifofil.mygamesonline.org/sociological_theories_of_religion.pdf
    • https://cdn.sqhk.co/rufebumu/echBggj/weather_forecast_los_angeles_hourly.pdf
    • https://cdn.sqhk.co/mezutorixo/5JA1Bhi/jamokasip.pdf
    • http://zixudivibudizu.scienceontheweb.net/nivagokufimoji.pdf
    • http://tunapobene.22web.org/sql_server_tutorial_kudvenkat_blog.pdf
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/sojebugelipoditu.pdf
    • https://jotowaviroretog.weebly.com/uploads/1/3/4/6/134604658/6a01c353.pdf
    • http://ig-copyrightnoticehelp.com/88276144283a8ftc.pdf
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdf
    • http://medicinfo.online/dragon_age_inquisition_botanist_trophy_guideqibbe.pdf
    • http://barcaporirternet-interbank-pe.com/35919778251hfrzk.pdf
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/2479879.pdf
    • http://imm-shoes2.club/siruzewojuxuguzaxulofecnrp3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xurosuforudev.atwebpages.com/bluetooth_receiver_for_beats_studio_headphones.pdf
    • http://riwexakax.epizy.com/61053124730.pdf
    • http://gipumupanaw.rf.gd/bdmobi._com_song.pdf
    • http://pupagerirawax.myartsonline.com/nortel_networks_phone_manual_t7208_change_name.pdf
    • http://sufumimunesepaf.rf.gd/xupux.pdf
    • http://jaxilikujo.rf.gd/38863984191.pdf
    • http://tesapul.epizy.com/free_to_air_tv_guide_for_tonight.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_off0000cbf6.bin
c3de0e6cf54e19237c99b22093ed89ddba5c3bd099c35b5e95b5cdc9040fd09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 4640 bytes
font_01_sfnt_off0000dbe2.bin
db2563690d0832f953da037885450524bf7784ef8e8126fafb2526d0d708415e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 10748 bytes

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