Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3e4d8ab210ac22…

MALICIOUS

PDF

64.1 KB Created: 2021-02-16 23:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 21a7c31fdd733693b40ed9ba1e2fd0ea SHA-1: 93b90905c1ad1e58b173745fa5e44f4749603379 SHA-256: 9d3e4d8ab210ac22622edd40f1c0c1e2f06efde4bd24da0ba434976659a655b4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=adolescence+laurence+steinberg+12th+edition+citation PDF link annotation
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/mojixekobul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_600d1204244e7.pdfIn PDF document text
    • http://tuzirifuxeza.iblogger.org/kolup.pdfIn PDF document text
    • https://mibinataxufix.weebly.com/uploads/1/3/1/4/131438539/motepuwe.pdfIn PDF document text
    • https://dilozerekake.weebly.com/uploads/1/3/1/4/131452754/191484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_6018ebf2a1e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_5fd74b3fc95cc.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/fotesagosex-pipegaruv-wokesusuvowabu-nabusixe.pdfIn PDF document text
    • http://bifitiguz.iblogger.org/17217980609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_601baa163ac5d.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/suzixegazunow/29279501410.pdfIn PDF document text
    • http://jefesati.rf.gd/68658682620.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/50251990636.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/56699416129.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/61616409046.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_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 5512 bytes
SHA-256: 73a378c1e64adce13b3a1c1b97a698554718042cc4a9a36be592c9e6d599cf72
font_01_sfnt_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 10056 bytes
SHA-256: 13bfa4889d44e98417c05ba551681e2ba5c62c5c57a39160ca7a3abd29c6baae