Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2657a0588c7fd4…

MALICIOUS

PDF

72.4 KB Created: 2021-03-08 12:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 519e8e6aa3363391c481424026def351 SHA-1: 393c0bc5c40134c997a522130ed3be497028ae42 SHA-256: 0f2657a0588c7fd4ef0dbac94e2642169068cf3d112536c6b24bfdf0bf8ceccf
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=traffic+rider+apk+download+%2528unlimited+money%2529 PDF link annotation
    • http://mugukix.mygamesonline.org/76382318743.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/effect_of_sugar_on_yeast_fermentation_experiment.pdfIn PDF document text
    • http://gimemuwet.mypressonline.com/45961955340.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/14396352238.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/mimabimubepidoselogaj.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/dialectical_journal_template.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/free_tarot_reading_career_path.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/luxinobovelanevekemaxogi.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/pigugavodegotudoxigaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_4fb464811edc4eb9aca143083e2a512d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a069ba15-8cfc-4288-b5ec-325c14c99acc/voicelive_play_tc_helicon.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/24733208191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ae8114-b8c7-4e12-a904-10efd68b3fcd/how_to_install_rheem_hot_water_heater.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/dasoxopusonagovij.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_0392111b95bd4ecbaa3df2ba9ee9d50f.pdf?index=trueIn PDF document text
    • http://vujuvisesakok.myartsonline.com/vonidepusetex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afaaa65c-4f26-408c-b0ff-fcb2eef3ce3f/how_hard_is_it_to_learn_tattooing.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_8e49f0ed5adc4d7a921b594b577537c8.pdf?index=trueIn PDF document text
    • http://xogijowag.onlinewebshop.net/mfj_945e_manual.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_off0000ddb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 5484 bytes
SHA-256: 4cfe3a76d912274fc432c24b3f614c672285a0e952a0e8a01ba376da0151499c
font_01_sfnt_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 10568 bytes
SHA-256: a19ed9449b7a8efcd169c2984159e27c9a21f32bc41c120f8525a3c80a13afa7

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