Malicious PDF — malware analysis report

Static analysis result for SHA-256 23eb04b17642ba29…

MALICIOUS

PDF

72.1 KB Created: 2021-06-08 15:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2d5d6c012d66af12536a960d7e0f93c8 SHA-1: c340da26d0bb81d2f21194f6fc996cec112785fc SHA-256: 23eb04b17642ba290574616181916e68b294df39c70538952a65c93574d780e9
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 0.9996

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
  • 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://chcial.ru/pbw?utm_term=fundamentals+of+physics+10th+edition+solutions PDF link annotation
    • https://wazelekur.weebly.com/uploads/1/3/4/3/134322050/7138677.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/gugatedi.pdfIn PDF document text
    • https://xujuladobagaju.weebly.com/uploads/1/3/1/4/131437733/bewesivaje-kexejewog-boleresededi-bujidujapomus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_60414054c4083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_6030ee53c712a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_6023bdb4e6ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_600fe56d690f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_604f2ddec0e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389809/normal_5fe7916375345.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/zolarodugadak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fe52fcae840f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nebapelamive.pbworks.com/f/networking_for_dummies_11th_edition_free.pdfIn PDF document text
    • http://sozevupegufi.pbworks.com/w/file/fetch/144848967/sibuguzevema.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144610287/charlie_malayalam_movie_tamil_dubbed_download_in_moviesda.pdfIn PDF document text
    • http://moxulolo.pbworks.com/w/file/fetch/144644760/pearl_harbor_soundtrack_mp3_free_download.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144707400/gods_secrets_only_hebrew_can_reveal.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/do_lg_smart_tv_have_bluetooth.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/w/file/fetch/144675336/13246066282.pdfIn PDF document text
    • http://fukibaso.pbworks.com/w/file/fetch/144693795/what_is_interqual_medical_necessity_criteria.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/shooting_simulator_unblocked.pdfIn PDF document text
    • http://lakobun.pbworks.com/f/pezesidot.pdfIn PDF document text
    • http://bezagodo.pbworks.com/w/file/fetch/144718620/90694172302.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 5552 bytes
SHA-256: d0ee11874c8a1427d02df38f7079580cd9ee6a69be0159a5cb8be2feb43cacca
font_01_sfnt_off0000ebd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 10892 bytes
SHA-256: 01477f7f42335c3ba1753237195a3e1855f318afe6817ad79c52539538446e78

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