Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e074285e40bb97…

MALICIOUS

PDF

84.7 KB Created: 2021-04-28 17:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7c3a9e44d65362a874d1a56d18b0169f SHA-1: 5367e37372ae39fb51278b00c7f6e679f5d569d2 SHA-256: 86e074285e40bb979c4c8bf659a77dc1fc08da14d04d97fee394f0b5e8385b5f
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://pelibifir.ru/strik?utm_term=dyson+dc58+battery+problems PDF link annotation
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/3166261.pdfIn PDF document text
    • http://artemk.ru/franchise_operations_manual_exampleeuvti.pdfIn PDF document text
    • http://lasns.fun/another_one_bites_the_dust_guitar_sheetzbuu4.pdfIn PDF document text
    • http://rankingcoach-seo.com/football_manager_2019_ac_milan_storys77mc.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/wijozevezuto.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/vidyasiri_scholarship_2020_application_form_download.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/segatago.pdfIn PDF document text
    • http://lorem.space/zinusufogyx2rh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/sembaruthi_song_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727f74b6-34fc-4081-b341-a2b05c58de1f/88893130404.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/45194642120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af8f33c-0bbd-4f65-a66e-5a8a5eedca96/how_to_calibrate_canon_mg3520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcd6f29-419d-43ce-ae54-45629f3eb1d7/42686386210.pdfIn PDF document text
    • http://waxuxeg.rf.gd/vizio_m43-c1_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/diwinadututudotitewe.pdfIn PDF document text
    • http://zasapetivomi.rf.gd/58486926512.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/zoxum.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/26091240378.pdfIn PDF document text
    • http://botalibinizor.rf.gd/62328186147.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC1 5516 bytes
SHA-256: 905c5350f47e09bc3d89341434125163195f2b277c3c70c1fd9bdb970f12985f
font_01_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 11480 bytes
SHA-256: a8a2ae3333948e338a0662862976e109b7b3b719565685a33d48f1b93ce816b5
font_02_sfnt_off000137a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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