Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a17ff0726b8c74…

MALICIOUS

PDF

72.6 KB Created: 2021-03-12 15:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd80e8353fdefe188983d6b399e852eb SHA-1: db2997fe42023539c5f2edf03114385c9e372ff7 SHA-256: b5a17ff0726b8c746f0ace6a7761c0d1ac8af17462f6d45198cd4d12e0180224
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of the attack chain. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/wix?keyword=mercruiser+manual+tilt
    • http://digtalcaliper09.xyz/games_basketball_pbawhbpl.pdf
    • http://axecheat8.xyz/nopogisapeso750ae.pdf
    • http://igclienteam.com/youwave_emulator_free_for_windows_100nv30.pdf
    • http://natorg.fun/hp_m452dw_service_manualv5dr4.pdf
    • http://copyright-help-report.com/blockchain_revolution_tapscottwy5sc.pdf
    • http://fertpin.online/organizational_culture_project_reportx55em.pdf
    • https://cdn.sqhk.co/josedinis/ihJmhee/planets_visible_tonight_richmond_va.pdf
    • http://zebisipojadowe.iblogger.org/lathe_cutting_tools.pdf
    • http://tublitalia.space/schindler_s_list_theme_sheet_music_freepw4y6.pdf
    • https://cdn.sqhk.co/soxuvezosapa/jeUhPig/66638337188.pdf
    • https://cdn.sqhk.co/givifevulo/hdugiih/boxujefupununerojukuwu.pdf
    • http://digtalcaliper09.xyz/ball_balance_game_download_for_pc40qpb.pdf
    • http://help-business-media.com/gugowegunomogogovikoxumorzn0tk.pdf
    • https://cdn.sqhk.co/sizozizaj/hdhbEia/63049127562.pdf
    • https://cdn.sqhk.co/tamaladafa/eiegdii/good_night_love_letter_for_him_long_distance.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_35ae88ba687d4dc780c2b16a21ecf068.pdf?index=true
    • http://litofafowiralo.epizy.com/96161184132.pdf
    • https://s3.amazonaws.com/guxosa/53278105355.pdf
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_d560064167704ae9914a1267972d27b2.pdf?index=true
    • https://s3.amazonaws.com/lerezazo/blindness_full_movie_free.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/fingerstyle_guitar_nails_or_no_nails.pdf
    • https://s3.amazonaws.com/penale/79580476873.pdf
    • http://dubebexo.epizy.com/bcsc_ophthalmology.pdf
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_1c30e1a600114452a4ff00773366136d.pdf?index=true
    • https://s3.amazonaws.com/muxegeza/royaume_betsimisaraka.pdf
    • http://nixutemexeteted.rf.gd/cg_cabinet_minister_list_2020.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_off0000e050.bin
2289c0dd3a89177888c9e7a29feff8de18df5f316d0193a54606f60e7a5bd87b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 4952 bytes
font_01_sfnt_off0000f114.bin
0f3feab7e21c6b82dca11bc9ec372ae2829a8b9f262a075599ba66798d044414		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF114 10476 bytes

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