Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac1492d927551db…

MALICIOUS

PDF

86.8 KB Created: 2021-03-22 09:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4164141946741134ef6bb83813a63e3a SHA-1: 9d1495a939e3d634e90d088d5581c31352c93f75 SHA-256: eac1492d927551db2f00eadba17e3d91adaa3f0a024ad4da47e18471d3c940b5
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://mezovuduw.ru/123?utm_term=bangalore+city+bus+guide PDF link annotation
    • http://kyhni.site/bibliografia_apa_articulohkyso.pdfIn PDF document text
    • http://d-youtube.com/kumunofexisikixawebilv3vvd.pdfIn PDF document text
    • http://rubisteq.online/diastasis_recti_prenatal_exercise6fh73.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/how_to_clean_filter_on_dyson_stick.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_603ed20337706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483608/normal_6004f33c3b974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_601b2d7f9f92f.pdfIn PDF document text
    • http://in-step.shop/fununevgspau.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/tefibomera55sbp.pdfIn PDF document text
    • http://farvestnn.ru/nigabotedimevekamogtwoga.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/catalan_independence_bidtofo5.pdfIn PDF document text
    • http://whalesqpa.fun/linksys_ea2700_password_change7d7ko.pdfIn PDF document text
    • http://vashastrahovka24.ru/open_office_cv_templates_freeonyt5.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/cdac84a0-4135-433c-aaf0-ae7056683d8a/what_is_the_immigration_and_nationality_act_of_1952.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/applications_of_digital_signal_processing_in_seismology_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debf72e5-1923-49d3-bb3f-35242a3987dd/68781877268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b64251-89e2-42f2-b675-c88c937817eb/chucho_el_roto_radionovela_capitulo_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954ac882-a3f2-4e30-88d6-b5c840ce77f3/jeux_de_carte_a_32.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3273213c-2724-42cd-a1ff-7920f04d0ca2/how_to_calculate_gre_cumulative_score_and_percentile.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 3

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_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 5396 bytes
SHA-256: 112c9e58bdc253efffaf469b82758d39cb5035d987444fdb21b4563ecbe3e608
font_01_sfnt_off000128b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B4 10944 bytes
SHA-256: 61f284eadc96a4b56d06a932768616bb900401d230805b58901f6f6e0a036397

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