Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a45e9828b52268…

MALICIOUS

PDF

88.0 KB Created: 2021-03-24 15:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 321f3a0245c7ae1538e2cb1d2d47fd19 SHA-1: 54759d9b53befc71064a0793f359d62d8911c073 SHA-256: e7a45e9828b522684b69e99f1b28900314e5197c22f19f5c52ce7bee46790599
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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.
  • 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://dafemum.ru/wix?keyword=does+heat+cause+metal+to+expand+or+contract PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fd140bd2655f.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/what_does_the_handmaids_tale_mean.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/old_mans_war_series_epub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6031d6815c20f.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/marketing_strategy_of_coca_cola_company.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_60166028e0e5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_8e9d0f34877940d7abe86580abbb1163.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa6c256-23b8-4611-a8a2-45d903d4c12e/how_to_use_a_ti-84_plus_ce_graphing_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/funcall_voice_changer_in_call_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/11090841523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df8ffb8-4027-495a-a5e1-cf611c17bdd8/sidege.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/wakovuduzaguwon.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/guide_taille_blouson_moto_bering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfc1915-4c16-4625-8d7a-8c89f4c9d4e4/41082530239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcede58c-6413-4a53-be59-139525e1ee61/think_of_me_phantom_of_the_opera_broadway_lyrics.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_35856c65d44a497ebfcb61f5f45234aa.pdf?index=trueIn PDF document text
    • http://povodakav.myartsonline.com/10818713911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148903d7-1db3-4e2b-9ace-3c95d09f5953/jelalalijabewuzotawiro.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/doniluju.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/16204843169.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/esl_future_going_to_worksheets.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_off00011837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11837 5380 bytes
SHA-256: 0e7241b07bf7c8de8a19dc5d3c7cce1a565ca6260a18b407e3ee6a1dd0253ff8
font_01_sfnt_off00012a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A60 11364 bytes
SHA-256: 7344592025c57adbc50b0bb2f78192d99f3af5a176235a9cb4b1516f41f12cf5

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