Malicious PDF — malware analysis report

Static analysis result for SHA-256 018c9cec06ec1267…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 08:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6e85700a22871a68d5606d9843db34f6 SHA-1: 2764dae3d7487c45edfd7dcb7652ee0b60c36866 SHA-256: 018c9cec06ec1267b773d7b2a488096f7e5f0df086adbaba95b9251657685b70
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a high volume of links on potentially untrustworthy hosting. The presence of 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' further supports the malicious nature of the file, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, contains text related to 'Dsc 1616 installer code', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=dsc+1616+installer+code PDF link annotation
    • http://remont-kholodilnikov.website/hide_and_seek_download_pc8x37t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5ff1d673746a8.pdfIn PDF document text
    • http://idealslimitaly.site/vuxamovolagixidoru6k7rf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495843/normal_5ff264a678f7e.pdfIn PDF document text
    • http://ing-cliente.com/77730557077owu49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5fd6f4cd56b08.pdfIn PDF document text
    • http://sayfelengs.space/jizirarolasedrv75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_60393e2f89c90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_fcb559dd5d994788be8fd92675829129.pdf?index=trueIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_66419a8cf43942308c5e770122858295.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/construction_subcontractor_agreement_template_uk.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_b39e868f40e34770b586904a0475f04e.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_886cb212e99d4caa867d7cab09d03922.pdf?index=trueIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_ef98b1e3f2d042e7b8cbafc98b0b0cf0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/antenna_and_wave_propagation_by_bakshi_google_books.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/committee_on_climate_change_aviation_report.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_f2138d355fe341898768960374b2a5f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/ikea_brusali_wardrobe_manual.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_692b100a1e5a41d1b2c6457bffdd03e3.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_8f3b1d77d84c4839b58368bdfc934b55.pdf?index=trueIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_83fd6e18d2f44217a9663b1432eadf00.pdf?index=trueIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_b93a89402b3d40a4827e39071d92cc49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/cot_bed_fitted_sheets_pink.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 4928 bytes
SHA-256: 6e585f4c288efd26056e897521f7a70d83eaebdd6fc6efabdc45e38132210053
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 10744 bytes
SHA-256: 3fb1b2c1175142b4d0c4189d97c7ee3c2af5776c7756b71483fff8deca6684a2
font_02_sfnt_off000129ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129ED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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