Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d03c7f8659d8c3…

MALICIOUS

PDF

84.9 KB Created: 2021-05-14 16:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 456db7a34cd9fec95f534f74d155e55d SHA-1: 7887d1ce16689e9bf8aa065a4b7cb552de5a6b2d SHA-256: 78d03c7f8659d8c3f6e23a54a5e6bfe7bc9dcf208b2b6aa1bf9315289f556c59
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 0.9998

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 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://ponafet.ru/strik?utm_term=mi+planta+naranja+lima+resumen+capitulo+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406466/normal_6017a65456721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_6053110018806.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/hfwijdQ/96578391752.pdfIn PDF document text
    • https://fapojenulexo.weebly.com/uploads/1/3/1/3/131383319/dabonafo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413980/normal_5fc6dc5253dfc.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/9751907.pdfIn PDF document text
    • https://bifuvabomefu.weebly.com/uploads/1/3/0/8/130814245/nalemozewunamulapaw.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/djghbgg/kotizinilemegufabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_606b6065136b7.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/b7b42889-1593-49a1-8c08-a96c5ed0566a/what_is_the_difference_between_sunni_and_shia_prayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6340a4c3-9f72-4994-90c9-9c6c71ab711e/vawika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c9e811-fba5-4bda-a312-f6857c232220/goworupasugebez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38450865-cbfc-47fd-b543-0acab9ca8f96/zoom_h2_driver_mac_os_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942dd8cc-5632-4b1c-a8fb-55639fda5c6d/pedagogy_of_the_oppressed_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3afaee-979f-42d9-8b9f-24fd12d18b2a/right_triangle_trigonometry_formulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6e76ee-42c0-4418-9f01-c3a7f777deb5/how_to_prepare_a_good_resume_for_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d10b17-1b79-47c0-920b-e9e0cfc04009/why_does_my_xbox_controller_charger_not_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b2602b-3b8b-4a6d-b281-f8b98db05be8/bupefekepolenafavelojowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccacff6-96c5-49c8-9a01-884bab7d3e01/how_to_turn_on_a_jazzy_scooter.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_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 5248 bytes
SHA-256: 0d72004417e15fac75b83933579aa423bda4b4264fc7df7a1ecda70c464341ad
font_01_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 12156 bytes
SHA-256: 18897cb03bb8a1fe68ec2fd452183330c4da44ec380ee528710540da95f98909

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