Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3ba9e82de1ec84…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 04:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11642d862991304a4c77f02815b57823 SHA-1: 5cff0aa3f7511dabb18aba16a507ee28155dbacc SHA-256: 6a3ba9e82de1ec84157f9b96a6a1dc63ce9775956aefc513a65116479a1cc9a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=hopewell+school+south+glastonbury+ct PDF link annotation
    • https://cdn.sqhk.co/texivewa/bsTPlie/setiputuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/hiz5ic7/894928117.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/jqxcZgg/selagukar.pdfIn PDF document text
    • http://momivelugi.iblogger.org/99350999896.pdfIn PDF document text
    • https://cdn.sqhk.co/misumirotoj/6uHrW2l/razubawofinute.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/gdtiiaD/mivanuto.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ejgegj1/turkish_style_bale_transport_apk.pdfIn PDF document text
    • http://kolejuf.iblogger.org/doctor_letterhead_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/IhfDihy/gevuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/uhe4jH8/zombicide_2nd_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/jbjiyie/rasamos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/kulizivazix.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/financial_accounting_b._com_first_year.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_f4c814b67e7d4f84a8cbb11d78b72b59.pdf?index=trueIn PDF document text
    • http://lazokobipas.rf.gd/itc_bookman_bold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/social_club_setup_free.pdfIn PDF document text
    • http://nunitew.rf.gd/what_is_waterfall_project_management.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/laruwever.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_b9f80801fbf1496aacfc07719b3a3ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zinudipir/on_green_dolphin_street_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/what_does_the_new_moon_mean_for_taurus.pdfIn PDF document text
    • http://vamovatalugoja.epizy.com/tail_risk_hedging.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_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 5488 bytes
SHA-256: 340ba8f88941497b1f5b3c3594cc8728477be731f279cb15dda640a98d88dab4
font_01_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 10804 bytes
SHA-256: b2b7bed54fb031e5f60d6a765ce4e6401c3ec378f6ffb4d0a79a2de35eeed9b2

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