Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8dc2c56dedc6f1…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 23:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4b96381c39e09331beb44ee28c47347b SHA-1: e9f10518c337e7437bcb47668123a24d0231d09f SHA-256: be8dc2c56dedc6f1c74b98512c6a5c0e608ae529b138ccf2c9868025baa2ef80
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 URL pointing to 'nipisod.ru', which is likely a phishing lure. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/award?keyword=april+current+affairs+2020+pdf+adda247 PDF link annotation
    • http://neyroskakalka.site/acronis_2019_iso12nz2.pdfIn PDF document text
    • http://udilische.club/3d_photoshop_cs6_software_free50rf9.pdfIn PDF document text
    • http://fallofelin.online/why_wont_my_fitbit_charge_3_display_worksfnx6.pdfIn PDF document text
    • http://koteyarn.moscow/lumineers_ophelia_sheet_musickjwvw.pdfIn PDF document text
    • http://dfwshootersupply.com/zanuzujobezosexilol8umt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kufazete/13289569670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d32bc96-36d5-4430-81dd-8279ef9bc04e/13964465533.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/55924167624.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/what_is_cycled_tank_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9eeee63-3624-4921-8067-ee561016f2dd/71956755740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0008cf39-fc42-4c80-b652-6d867c36f3a0/99025072592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2169c7cf-952e-4da7-99f5-94d3de083705/40521216689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfbc5a6-00f6-47b8-8daf-3ef76c5879bf/vobewafidi.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/36149529977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f559f1e-cc2c-4949-ab42-82966e85e00b/jaxaka.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/70610470080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e973dd4e-6bd0-4bf2-9229-df179bbdff2e/how_to_write_a_conclusion_for_a_poetry_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7965f9-5f4d-48aa-a872-b509955d631d/radar.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/711548649.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/fabonapevalawosafesufosez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400c6411-1d0e-477a-ae54-c3e1f707a40c/27189222789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adf706a-c733-4fb3-98eb-593cae45a9a2/what_is_full_form_of_pcos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b96d472-dbee-4129-8aef-14b8373eb030/honda_generator_eu3000is_carburetor.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/52196808775.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/93843186997.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5580 bytes
SHA-256: 6d0149930047d4cff207b8e3f84ccfd85132e71c2d1cef357c78820f22a90ef1
font_01_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 10332 bytes
SHA-256: e2f6efa56160132a65d98b5155c6cbef39dd655af3d168a446308ee13cf5a365

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