Malicious PDF — malware analysis report

Static analysis result for SHA-256 559b8b0ed8e482ec…

MALICIOUS

PDF

69.9 KB Created: 2021-05-07 07:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7fb5da719305079c88193fff41f2de9d SHA-1: d7de13de2fe6aeee374d6b69507dde03e5338d2e SHA-256: 559b8b0ed8e482ec218526070a3ccbfc234c3afe9f2bc3c7496103ed06f01c24
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=mf+135+parts+manual PDF link annotation
    • https://cdn.sqhk.co/linigurep/iiiiGhc/total_quality_management_textbook_mcgraw_hill.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/9193648879.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/explain_how_atoms_or_ions_combine_to_form_compounds.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/odisha_tourism.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/f0NhjAV/great_little_war_game_2_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_60126c0c75dd7.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/helter_skelter_zombie_manson_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/eQZuhdu/95992879944.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/OVqjahk/fox_deportes_directv_guide.pdfIn PDF document text
    • http://pedron.fun/lincoln_weld_pak_hd_instructionsnfa9g.pdfIn PDF document text
    • http://sendgrid-de.com/75130011843zt43p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_6008b9f73fae0.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/Xgh3Ugi/past_present_or_future_tense_worksheet.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/c7c49884-b776-4db9-8add-2a7cf9228c22/agile_software_development_principles_patterns_and_practices_github.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/saviruwiburegotujut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616b3ef2-88ca-4673-b478-c8ba86301e54/disefaluvosalowujax.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/fokekodasirivikesisikaxu.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/lidosoruxijupapuvavabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c078a643-1ef4-44f2-bef3-681ceeab6b08/right_and_left_rudolph_game.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/12874000386.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_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 5392 bytes
SHA-256: 74ab82945ca5b0894f6d3ed876bdc84944898e4edc3d79fd80a4c79621d9eeab
font_01_sfnt_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10540 bytes
SHA-256: 5fa4bcd5865137424e43182308b0d168315c37d5bf1674e9427c82c46d8117f1

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