Malicious PDF — malware analysis report

Static analysis result for SHA-256 56183e8e4ebf120b…

MALICIOUS

PDF

82.2 KB Created: 2021-03-14 04:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2c462a1345a828f2198b16f8a00a6244 SHA-1: 1049e76bdcdcfcfe5191ca0b833ffc71dd387055 SHA-256: 56183e8e4ebf120b02d2d329d72643989e42fb5f14e6523bb2c889a41ed3c212
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=efectos+adversos+de+los+aines+pdf PDF link annotation
    • http://yeswins.space/information_report_structure_stage_1q5483.pdfIn PDF document text
    • http://specialsale.info/automation_studio_6_64_bitywk6k.pdfIn PDF document text
    • https://sojofemek.weebly.com/uploads/1/3/4/3/134310133/jifibabofebesi.pdfIn PDF document text
    • http://lnstagram-office.com/45294898591i79bw.pdfIn PDF document text
    • http://drive4mclaneaustell.com/how_to_build_a_viking_axeivj7w.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/deutz_f4l912_engine_parts_manualxpdal.pdfIn PDF document text
    • https://kutikeso.weebly.com/uploads/1/3/4/4/134490414/3524872.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/fomaralunex/goterowevotogozoxepefor.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_3e49032e37c342e0b83a5138d1e50799.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/accumulated_depreciation_on_balance_sheet_example.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_256c622bb08f4ff4acad4765865770f7.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_b178dc05bda447d1af42a4f45dd2bf66.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_2d4284c7ec31494f94ba8017f8eab4ae.pdf?index=trueIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_99dad75b0dad46489a9d0eb45c7421c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/mariage_d_amour_partitura_para_piano.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_9464133f13af47b2bdc2fed52ddbc99d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/94836903299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec431758-b2ac-48c9-8350-3e368fe4393d/xenaxobesej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8f4e5f-fd5b-4b5e-bdda-358a0f59e5f7/how_to_program_my_craftsman_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/23000112822.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_2a8d452ceb304caeaca2150c75f00f60.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_052001ca32664848adce1ec80adfb751.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d51137-eab6-44cc-85e9-82821dc956a4/how_to_connect_surround_sound_speakers_to_tv_without_receiver.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_79ec1a488d0644ebaa233f9172e00cb2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 5164 bytes
SHA-256: e2e4bda3bdc12a629291f2f99c1fb404f63ca66af947cbec42b8409c32a29fe2
font_01_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 11896 bytes
SHA-256: 12aca34a3d2ee585c3a88210fe0e1142b91d8d53d5c2e2ddb6cdb0666a839ea2
font_02_sfnt_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd