Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a4a50cc94b6437…

MALICIOUS

PDF

75.3 KB Created: 2021-03-04 19:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4db6e8449efe7246233574eb5cd708b2 SHA-1: cd95c0f0ea4a223a7af3d54799864bfa2e88ada4 SHA-256: 66a4a50cc94b6437568a6acc28b2485570b9aeef195a85d58a1ec1c49c6492bc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or SEO spamming technique to direct users to potentially malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to redirect users, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=python+dictionary+get+two+keys PDF link annotation
    • https://vebupewisagamuz.weebly.com/uploads/1/3/4/7/134704660/serutepurazigigewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fedfc8563a78.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/dgikghV/smilodon_rampage_2_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_603c19db26b71.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/lQ9hahc/singing_in_the_rain_movie_streaming.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/purex_ladasele_zuseraleraripir_runobokezob.pdfIn PDF document text
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/jedumok.pdfIn PDF document text
    • https://lejegibovijidup.weebly.com/uploads/1/3/1/4/131438293/jojotedilos_rukega_dedenufox_sugogisom.pdfIn PDF document text
    • https://dijodiruji.weebly.com/uploads/1/3/4/0/134097483/xosenuku.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/c7a253.pdfIn PDF document text
    • https://xejulanuvupif.weebly.com/uploads/1/3/2/7/132740270/pixukibatas.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/voxulija/jasper_report_template_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/basketball_jersey_template_psd_file.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_33204370457448d7b679f13e506e9f08.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_05ad3d1b409141b0bf138e1eed64ff20.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_e3a133751bb04722ba1ead922358eda1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/14745913106.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/free_audacity_software_for_windows.pdfIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_e88aa16caa374730af1f2d3636df22d7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 5428 bytes
SHA-256: 30abd8d3fdac01b435fd0dbd2ae8de694228ae576c4abbcb140632703f4fb1b0
font_01_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 10516 bytes
SHA-256: d05b9012a2d419487ac2844843c853d51a68aa9074491b6e557243117e23b562

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