Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71182b3933a1616…

MALICIOUS

PDF

74.9 KB Created: 2021-04-08 07:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 544b657b9d78fe2fdaf79a42fcfdc84c SHA-1: dc68996a68ad4f02a27f6643b92a733e2faa279d SHA-256: b71182b3933a16162ae4f5d3d20aa2cdb22153c6daf1868c56e21cb052793cda
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 0.9997

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://pelibifir.ru/123?utm_term=children%2527+s+rights+worksheet+pdf PDF link annotation
    • http://tapuxuwurumar.22web.org/kavadinavodibodudipor.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/JjfIVnW/nusotuxodejonimaxup.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/7536866.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/ledem_mifoxesepelofe_jepoguvuwur.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/iWOxehf/airport_city_hack_no_survey.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/systematic_and_unsystematic_risk.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/ejahegh/hit_the_glass_ceiling_meaning.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/f5bdb1ae.pdfIn PDF document text
    • https://nemoradusa.weebly.com/uploads/1/3/2/6/132682182/magutelibujakewi.pdfIn PDF document text
    • https://temeromaxuzi.weebly.com/uploads/1/3/4/7/134745627/kebuwoz_kunemulekifoga_mokugixijulifob.pdfIn PDF document text
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/fabidukezoropi.pdfIn PDF document text
    • http://kanurapubefuxo.iblogger.org/root_checker_pro_cracked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/egjigpc/5_minute_crafts_3d_pen.pdfIn PDF document text
    • https://serogewuf.weebly.com/uploads/1/3/4/6/134615077/a8498.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/000f8199-5158-422b-ae54-3da86fddb3c9/pudotulowutofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31df2a90-b28a-45af-beb5-95c7e464228f/risupiru.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/jifilodubojifananusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30701a4a-c6da-4ba8-82f0-0312afb9f3ff/futepe.pdfIn PDF document text
    • http://komujawabajufob.rf.gd/18417506138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891e2920-c02e-41be-8ee2-82add25d259b/77474977619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cdeb2b4-fbb8-4f73-b6fa-5febb8605b69/conscious_discipline_for_parents_book.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_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 5188 bytes
SHA-256: 0ebe52562e55129e4b30d3087a32ae2878d134aabc2e4c356d1866a995e04e2e
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 10648 bytes
SHA-256: ec7530e7f7745280605ddfe2e024495fe6d04c9e3e1d9b8ea31ae6ae356c7b8b

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