Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f9fa60ed705b26…

MALICIOUS

PDF

61.5 KB Created: 2021-02-13 19:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 97085c5c421d24c9de0f8c935228e21f SHA-1: 8f3437c4f11698ecb0ef7e7d1b9cb381a9ce2bcf SHA-256: 28f9fa60ed705b26f3cd13f5f993ada9aca70ecfd90baf012c07a34415d828c8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=2020+deerfield+elementary+school+lexington+sc PDF link annotation
    • http://mixevome.22web.org/calculator_for_java_mobile.pdfIn PDF document text
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/d8f52.pdfIn PDF document text
    • http://gusedori.iblogger.org/losuzesafulinobuvinefopo.pdfIn PDF document text
    • http://forecast.bet/faith_family_academy_jobsls4mk.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/fakusul.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/gijewoboniniv.pdfIn PDF document text
    • http://lg-supportteam.com/gulitorivalomexr3g.pdfIn PDF document text
    • http://vejinow.22web.org/hack_wifi_mikrotik_di_android.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/zeluteviwogevupij.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/bamiputamaver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tixinova.rf.gd/hodder_education_checkpoint_maths_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/notowazud.pdfIn PDF document text
    • http://livofos.epizy.com/tuxopuzusev.pdfIn PDF document text
    • http://nividibewejoba.rf.gd/22348834780.pdfIn PDF document text
    • http://padepivezaw.rf.gd/jakixirupinolepumujepen.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_off0000b62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62B 5784 bytes
SHA-256: bd305ddd28a87eb0fb920bdf2a865bf572b850a849844829cf1218e6515124d9
font_01_sfnt_off0000c9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BF 9068 bytes
SHA-256: f5edcaa9f604961e8e6c68313c593db5db8e4a2b56f38a3a96a5c7f06d897f50