Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fe06abde19ce84…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 10:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 70e3ec0d5576f2022094ec86a09c506c SHA-1: ef8d9ae156000feac41df870ba644e0c9c689233 SHA-256: d4fe06abde19ce8456ed1d42035a192ca86bc65e590ed12851fe31f2503bc444
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 0.9998

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://golowaki.ru/wix?keyword=gateway+to+college+prep PDF link annotation
    • http://nuxuzuruguli.mypressonline.com/learn_arabic_language_free_download.pdfIn PDF document text
    • http://dommasters.site/were_there_any_books_left_out_of_the_bibleftmdd.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/72145990533.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/jj10iig/school_health_and_nutrition_jobs_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/FgjgciT/archery_targets_3d_sale.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/vosadonulojotuzozuzo.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/dukim.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/nevapufixuzoli.pdfIn PDF document text
    • http://instapriz24.site/wapumizowan4k7yf.pdfIn PDF document text
    • http://gafuvufafokujop.sportsontheweb.net/physical_science_gk_in_bengali.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/sagemcom_fst_5260_router_wireless.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/idifujc/nomao_camera_app_apk_free__16mb.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/7ujchig/kill_zombie_now_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/jjbngeK/kijojulerasovijimu.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/xopujebipisabife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitilogokufalu.atwebpages.com/oxidative_deamination_of_amino_acids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b135cdbf-9da3-4e3d-88fa-558117a037ed/furajaguses.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/papizatupisamexesokawefiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69247572-3250-498d-be2a-7426676f0744/jijujofozufomuxivupirix.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/oceanofpdf_new_domain_name.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 6

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_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 5148 bytes
SHA-256: b57fcc861a27fe5217a962be7edadba9543ecdd6e237a11b967a88553ebff62e
font_01_sfnt_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 11424 bytes
SHA-256: c8b35a36faf5b26b810f2a99ae6bf4a10dfa13fcb94f2c8d73b3dd73204f9854

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