Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1344755c65a1f1…

MALICIOUS

PDF

292.8 KB Created: 2021-06-08 07:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2b7b377ddf2db4a3c563769f8fb5268 SHA-1: 8ead3a97fa07208af9fa1ba8279b075531dce7b1 SHA-256: 1f1344755c65a1f1521dc2f95229792288912284805ec1565e95a87fab69d271
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/123?utm_term=pt3+english+section+c+exercise+with+answers PDF link annotation
    • https://gewupokisata.weebly.com/uploads/1/3/4/6/134606569/zoven-kadavefevupuw-muzivazip.pdfIn PDF document text
    • https://faruroju.weebly.com/uploads/1/3/5/9/135986438/medaxazasonulajedovo.pdfIn PDF document text
    • https://sozogamawi.weebly.com/uploads/1/3/1/6/131636736/856750.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/sedaxa.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144516972/61192939842.pdfIn PDF document text
    • http://rutarotovez.pbworks.com/f/74920019429.pdfIn PDF document text
    • http://xivoxibuza.pbworks.com/f/1998_subaru_impreza_wrx_sti_type_r_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae7e2ce-2d48-4d06-9f89-9487ce282ddb/92925733065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d87464-ca74-425e-9714-7ed2b15cc8c7/gufimana.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144414783/real_book_bass_clef_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748eaf5b-bce9-44a3-b02a-c0e9e9265f08/bobiradep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14660060-e898-4605-9504-cca14921ab9a/what_are_the_3_stages_of_the_water_cycle.pdfIn PDF document text
    • http://laxujaju.pbworks.com/f/ocs_ec_checkweigher_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a76bd01-35db-4594-bb2f-e02e6bb717e7/how_to_start_write_a_grant_proposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5ac133-a3b2-4968-8b0e-64d532e78525/53351086867.pdfIn PDF document text
    • http://wodupabizel.pbworks.com/f/9673137544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81777aef-562f-4b88-a13e-315e780ddc6c/ar_15_magazine_storage_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f0bf25-7813-4fd1-9ab7-4a04a5bb2c13/porolanutosi.pdfIn PDF document text
    • http://rupuker.pbworks.com/w/file/fetch/144731547/71413370437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40ba6e7-edfd-4f5b-b608-e19a439fa927/92236966723.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00041184.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41184 13296 bytes
SHA-256: 05d46e986e5cb2ab39110221339201574d5b0ea24ecef9432122310e6336b114
font_00_sfnt_off00030847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30847 81984 bytes
SHA-256: 38a69374042bb8b335d67aa229b9ac3ad23113d265ad284b27969b7c93b5f231
font_01_sfnt_off0003ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF21 5388 bytes
SHA-256: 95d2a5cffee891c3f50dafd69e7d25b420972289e19fcfaab0079ad0e58af8e8
font_03_sfnt_off000432ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x432EF 18244 bytes
SHA-256: 3c18d213a826cee409fe70c9f7f354c35e6a0e0c7e2ba8cbaab71d278fc61c02
font_04_sfnt_off00046ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46CA1 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330