Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a2b2ba9eef3d4f…

MALICIOUS

PDF

265.8 KB Created: 2021-03-31 09:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c933b08a84eef0b30d7bb3cb3c3657fc SHA-1: be6b4f1905100c19ea3c89179df7a0026b310d7b SHA-256: f4a2b2ba9eef3d4f230a67aaecf365c0d8b8ee5c12eb9c1485838ff1b7841428
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it contains an external URI and an advance-fee scam lure, suggesting it aims to trick users into downloading a malicious payload. The document body, though heavily obfuscated, contains references to 'concise english grammar guide' and 'wkhtmltopdf', likely a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/123?utm_term=concise+english+grammar+guide
    • http://mujabelor.mywebcommunity.org/echo_srm_225_trimmer_head_disassembly.pdf
    • http://xelamoxadavas.mywebcommunity.org/nelenepaf.pdf
    • https://webenewosa.weebly.com/uploads/1/3/1/4/131409170/d8ba7c543a15.pdf
    • http://j3vnci4.xyz/when_is_a_series_of_unfortunate_events_season_4_coming_outt5qsv.pdf
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/veraxola.pdf
    • https://baxufolodamiz.weebly.com/uploads/1/3/1/4/131408032/zilagiduzuzolar-zoxijivubazan-sodubijejapok-ranopu.pdf
    • http://amsidgi.xyz/hosy_learn_100_languages_free_downloadzfx8o.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5815768.pdf
    • http://bigno.space/idle_car_tycoon_mod_apk_1._19f5vac.pdf
    • http://folejaf.mypressonline.com/fegidaxadufa.pdf
    • https://ripegedabezigiz.weebly.com/uploads/1/3/2/6/132695689/jenukexijuxixil_seragelipax.pdf
    • http://xiwesesakuvel.medianewsonline.com/rekiluderipewamusobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/90d59f01-12cc-4718-9206-519f648a76d7/jojal.pdf
    • https://uploads.strikinglycdn.com/files/09b1b3da-9f4e-456a-8075-124241576464/how_do_i_put_sound_on_my_akai_mpk_mini.pdf
    • https://uploads.strikinglycdn.com/files/0e5b70cc-377c-4ba7-960f-58fcefd859b2/calculo_de_integrales_impropias_ejercicios_resueltos.pdf
    • https://uploads.strikinglycdn.com/files/b4a3aedc-89c1-4d7a-8bb7-c728a6466b31/how_to_fix_a_noisy_frigidaire_refrigerator.pdf
    • https://uploads.strikinglycdn.com/files/e30e5f36-bca2-467a-bc52-3fd4841a9ca9/rejubiku.pdf
    • https://uploads.strikinglycdn.com/files/898a6056-27ac-4b3f-9157-c67d884bd100/how_much_does_it_cost_to_service_a_heater.pdf
    • https://uploads.strikinglycdn.com/files/ea11b771-97b8-48e5-886b-25a95affd8dc/60409228530.pdf
    • https://uploads.strikinglycdn.com/files/d1bd7342-73b8-46a7-8b8d-673e91cc2e08/3125143342.pdf
    • https://uploads.strikinglycdn.com/files/bfd257c7-d9cc-4ed4-b7e8-49f5cbcb5aca/how_to_be_an_iso_9001_certification.pdf
    • https://uploads.strikinglycdn.com/files/de03f090-2375-4bf9-8ded-6eaeaf107ddb/do_roku_sticks_have_bluetooth.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_off0003dcb8.bin
f7c106040bcd792af190240693c0ee56f04e853ed93868fe2d52acf5b8cdd587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3DCB8 5260 bytes
font_01_sfnt_off0003ee61.bin
93e775376ab7ee3fb55913290280eca4eb41cf6a1f1d08601399c797a2e22a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EE61 12224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.