Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f60f59687ddbbe5…

MALICIOUS

PDF

76.1 KB Created: 2021-03-29 20:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91d2df5827a4f17dc42f2e1ff753a3fc SHA-1: 7388041e4cc8a896bc27b2ca40082099f08cd917 SHA-256: 3f60f59687ddbbe5baf15d0c78280d0ab4b3dbbe5d1c2753a3829c7449d0b2ad
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 0.9996

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://jumiwimov.ru/award?keyword=ceramic+materials+science+and+engineering+carter+pdf PDF link annotation
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/dupisapazi_temuvizof_fekewimovowu_rulosuluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5ffb27a444638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_605ce872cfe8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471941/normal_5fdc5393cd3b3.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/gejavokoruk.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/fadobizejawezuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_6047f65283d86.pdfIn PDF document text
    • https://zikemuwebiwolim.weebly.com/uploads/1/3/5/9/135992964/zanag.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/aa67a834-f99a-4993-ad0b-1dcbd1b2e035/elements_of_a_short_story_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b239b716-f54a-47c3-a170-4a916605d57c/parts_diagram_for_kenmore_washer_model_110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d056be1f-95dc-4e03-9d69-a2ea69daedc5/faxivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0254e6a8-71c1-40b5-8c98-a23e13b06383/malawusunusuluripisovisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e66adf-49c9-4e2b-8bef-547eead04d86/turibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489a35e4-1201-4e73-83d6-2636ca4f04e8/accu_chek_nano_test_strips_and_lancets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61b0524-0b2d-4009-8e05-935b0eb14f13/how_to_make_origami_paper_mario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cafa959-360c-46f7-9a11-cbcf70972290/the_last_wish_audiobook_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caab6a5e-f2ed-415b-a0b8-f86aae9244f1/n600_netgear_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e04174-f45f-4936-8ef9-5fbf0b21c751/bose_solo_5_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7454011e-e054-4332-bbcd-5dd6909a63d8/jutejakumuzopanekofemuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd91ce43-6eb2-41e0-809f-5650eeb2563c/resumen_del_libro_el_secreto_de_la_ley_de_atraccion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44be6c45-a031-4ad4-882f-73f7f2c75f4a/what_are_the_different_types_of_keyboards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac6a346-9d83-4071-bb29-6c416a141a60/tenewefozizusazezifik.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_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5380 bytes
SHA-256: 1205b5b2b7689090993da490f2081302fd23b2224c4070d7bf112928ddd07806
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 11424 bytes
SHA-256: df5610ce4423cc28b91fb12506b446583896b41ddfd30cfa6d80591616a7cee2

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