Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df4a185fe733ca3…

MALICIOUS

PDF

77.8 KB Created: 2021-04-27 04:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 535107e2e0760af0d34d54bffc4ef934 SHA-1: 1192704dae974d5704c425e85a85f3dc0824d948 SHA-256: 1df4a185fe733ca3ae05203a12d94765c7058e465805c0e1c0b7ff65fcc066fe
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=skyrim+xbox+one+keeps+freezing In PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/3f0e961.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/nibunepixaridomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_6056661aafb7a.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/034574806c4.pdfIn PDF document text
    • https://ruminugovukaka.weebly.com/uploads/1/3/0/7/130740017/gezepo.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/kikawo.pdfIn PDF document text
    • https://xigukiburid.weebly.com/uploads/1/3/2/7/132741693/09d4d9b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_5fdb6844a64b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_601f26de04e24.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://s3.amazonaws.com/kodipopujufipig/gesizaxorudetutiraxad.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/who_makes_silo_brand_tv.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/22136685677.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/batch_picture_resizer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/93600558863.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_fba5106f37af45dcae29ffa5b32ed8eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/warren_buffett_way.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/dyson_dc41_animal_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/xaretumidimef.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_974790ad90aa405eba719952faa3495c.pdf?index=trueIn PDF document text
    • http://zutaturusix.myartsonline.com/tamil_language_learning_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/14384162371.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 5216 bytes
SHA-256: 7fa930d6ce00c6455d8fbb5015484a11aa60368d66ff5b9427796e37a871b6b1
font_01_sfnt_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 10608 bytes
SHA-256: 0958b6d45423749cb703771a95d1d5508085f420a79b1d0ca65af904211640ed
font_02_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34