Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b45256b3d3f35f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 17:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39526f1226d521d87533058df92239e9 SHA-1: 914cf58ff662e8086aa5cd252e90e9b8a98f002d SHA-256: 23b45256b3d3f35f936789bd83a3d177a9fb8570224233273e268d61bf82cfc2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • 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 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://resalured.ru/123?utm_term=analytical+method+development+ich+guidelines PDF link annotation
    • https://miwijefovutifim.weebly.com/uploads/1/3/5/3/135316182/fibinexezurazumiwu.pdfIn PDF document text
    • https://mabatuba.weebly.com/uploads/1/3/5/3/135303696/6fc0d96ffc75b.pdfIn PDF document text
    • http://naturka.space/60416436548y32jf.pdfIn PDF document text
    • http://woberate.getenjoyment.net/68909315629.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/8128229680.pdfIn PDF document text
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/77dcd04c.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/pigurifobozoxil_rutukitomim_rosilogomej.pdfIn PDF document text
    • http://esagafow.fun/luseligigovpx1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5fe2e36d44eee.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/69273110340.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/napirinanilabovazugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fe4f8043c7cb.pdfIn PDF document text
    • http://smm-target.ru/why_will_my_samsung_tablet_not_connect_to_wifizlcb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4daeed9c-999a-4cad-bf98-58fca7d82b45/fubigajadezuwetoxasavap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfecbc5-f6e7-47f0-b310-0262dcdec780/dont_look_back_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1509ac4-6971-4789-be52-372843191ac9/what_to_eat_to_get_in_shape.pdfIn PDF document text
    • http://fubulojanuleze.epizy.com/jipazewulipubukababedovu.pdfIn PDF document text
    • http://kesobir.rf.gd/nuvupimukuzategejawufi.pdfIn PDF document text
    • http://dowibisewapidon.rf.gd/college_recommendation_letter.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/71764270981.pdfIn PDF document text
    • http://dirujuwut.epizy.com/pomozuzudav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac799496-8f63-4f24-9cb2-7d3a3e2a2520/9944242525.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_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 5540 bytes
SHA-256: 26a96172130c472d2e3ac7f6002f2485f93fba34f8f173b1537225ec54e20e3e
font_01_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 10956 bytes
SHA-256: 8964594026c31213f9f71648aa909c19bd74205516796a39c0f4047023a106e5

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