Malicious PDF — malware analysis report

Static analysis result for SHA-256 4172f49c3b722adb…

MALICIOUS

PDF

78.4 KB Created: 2021-06-11 08:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4263baa04a566e3e47193747444d652 SHA-1: 5e0ddd1b1a5bf9e57c68e0c5899e183d827754ea SHA-256: 4172f49c3b722adb0d8b754d9f2dbe08ee9d41c2129416d31639322df3f201cb
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://crysiq.ru/pbw?utm_term=undertale+download+full+version+free PDF link annotation
    • https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/rinejufej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fc938c09912a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_604a640a360c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5ff85baf02cdd.pdfIn PDF document text
    • https://fukuzemuk.weebly.com/uploads/1/3/5/3/135306557/jiduzat.pdfIn PDF document text
    • https://kunubixofatefif.weebly.com/uploads/1/3/4/0/134096788/gafumomezefa_nuber_zozidabet.pdfIn PDF document text
    • https://puwaxitakobesod.weebly.com/uploads/1/3/4/1/134109073/7a0e81a74.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/sizip_vefuwupawavoni_fopik_tozubiximedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5fe9ff956c1b0.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/3779406.pdfIn PDF document text
    • https://naxibanumudu.weebly.com/uploads/1/3/7/5/137516291/6512758.pdfIn PDF document text
    • https://fibexijenoka.weebly.com/uploads/1/3/2/6/132680926/5480279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_5fda426e62fd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonodatob.pbworks.com/w/file/fetch/144719544/dalaporigebazakobuwulepo.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/w/file/fetch/144559791/minecraft_pe_shaders_download_android.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144584124/quotes_from_the_book_wonder_by_rj_palacio.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144725307/banco_popular_de_puerto_rico_hipotecas_telefono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5fdae6-c3f9-4cb6-9812-cf44ed1eb3c8/how_do_i_connect_my_polk_magnifi_max_sr_to_wifi.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/w/file/fetch/144446040/saddleback_basic_english_grammar_book_1_answer_key_download.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424212/82006588735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed734436-64cd-4a50-9768-a9021c14f727/tanya_the_evil_art_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd9eb80-39da-4737-a118-2ff0f2e3475e/sitafoginifolizidosetasud.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_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 5044 bytes
SHA-256: 1308d5b8de6cf00f6f644417480f97b80a2c70e24e4a7b703bee039e798c82e1
font_01_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 22284 bytes
SHA-256: 7236406cdb1a53809f2e5e829ebfb307c8c52400b7bee4545eabb98837d35fb9

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