Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f96301385fab0c8…

MALICIOUS

PDF

66.3 KB Created: 2021-02-14 23:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c20c8f1649f2758c3f122633deab0cea SHA-1: d9b5ceb7ecc140db92ba3e836f5013d0d1c11a09 SHA-256: 1f96301385fab0c8209d205f717e0c56f69d33d2050247a3c1296ca09594321f
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 0.9998

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://jottigo.ru/wix?keyword=heat+n+glo+6000+manual PDF link annotation
    • https://cdn.sqhk.co/nijusukelok/egcicic/wipugovaxegidixotuzed.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/ejhgi3p/newujiroxegijazorajake.pdfIn PDF document text
    • http://instapriz.site/22303387509uczji.pdfIn PDF document text
    • https://jugivukovetid.weebly.com/uploads/1/3/0/7/130739525/6071659.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/hggha2k/senamiwol.pdfIn PDF document text
    • https://kunejadisitezan.weebly.com/uploads/1/3/4/0/134096254/wojusi.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/QhfX1V7/38712043898.pdfIn PDF document text
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/6397836.pdfIn PDF document text
    • http://counterman.ru/designer_cv_template_psdqzkzj.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/waxegatulo/fanularopuxuxixazofitaja.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/34017916073.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/45132389058.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/angular_form_input_default_value.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC937 4988 bytes
SHA-256: 383787b981ff7cf1654d113696b82c753bb446041de824232666b5703639da1e
font_01_sfnt_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 10228 bytes
SHA-256: 8b28505dbf2c6e399a755b045d414ec01b9380419c92c9c403b04ac1db25f93d