Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45f43e03bbd027d…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 14:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e79e547b282303872d13b054231ae142 SHA-1: dd7c9a30e652e5ba2ecf299e7776c6f983338efa SHA-256: e45f43e03bbd027da289c7d6a0916e7cb98e1e9274c42f626c439a8aab5336a2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO link farming or phishing. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, indicating a mass of external PDF links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/aws?utm_term=how+much+does+a+retractable+awning+cost+uk PDF link annotation
    • https://cdn.sqhk.co/naxudufejik/jdfUjjT/goblin_slayer_character_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/OjgdOnE/acellus_homeschool_sign_in.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/64265941229.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/jGwUggf/74282504134.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/eghmyaS/gularezajusegadufuran.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/acquisition_of_mathematics_concepts_and_processes.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/xonaxevetaf/30311611416.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_8ff305f4413442fb90903a919f473bcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/value_education_question_paper_for_class_6.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/52470285657.pdfIn PDF document text
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_b101c1ed10f6489ea77ee7269ffaced3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/personal_expenses_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/canberra_centre_store_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/85743999498.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/metosuwozitiwanufob.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/kenwood_kvt-516_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/minecraft_windows_10_edition_free_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/sound_recorder_windows_vista_free.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_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 5612 bytes
SHA-256: 16de601740962e2c47fd7f65ee38503d3ba540bf4209969c583668ac2b0be428
font_01_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 11448 bytes
SHA-256: b2f3fcd58bc65f5b9dda008b8d16f6def77d0a1f82b5629ad689d2f92fb2074b

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