Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d22ce04888a1939…

MALICIOUS

PDF

80.2 KB Created: 2021-04-10 06:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c575e2d3947644acd961a2a7db29948c SHA-1: 5932ce6606d8029272c8de5388f33d93742c0fac SHA-256: 3d22ce04888a1939a637b26f1e7c54e5c3fd9cf01532df27f85894aa4ef09323
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 0.9994

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://vilenefex.ru/strik?utm_term=transitions+for+1st+body+paragraph PDF link annotation
    • http://vuvajujuli.mygamesonline.org/pudozaxirakobezoze.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/composite_cavity_preparation.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/what_does_fluency_mean_in_math.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/luxetinamate.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/26ed775d-0b95-42b3-82d6-4fe6ab4148ea/sony_str-dn840_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/what_is_the_meaning_of_a_mechanical_pencil.pdfIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_c3892ef814df4e87bff56f6a4fa39631.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/portfolio_lighting_parts_replacement_glass.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_a804092abdcd4fc08bb136a670778892.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_7353dd55b0c448c38f10e25d147620e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/zowuxakefixigowuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e77a62e-58bf-4f20-a342-e7e907f7d59c/yes_please_meals_headquarters.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/a_monster_in_paris_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/bounce_rate_website_template.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_2f8d30cfbd9b45b9b7fe6a567e91aaa2.pdf?index=trueIn PDF document text
    • http://sabiwilurase.atwebpages.com/pedefawonozerulawonut.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/craftsman_25cc_gas_blower.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_e44f60c452064e439b3906513549794f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/how_full_do_you_fill_mini_bundt_pans.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/walking_disaster_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/cast_and_crew_of_maze_runner_scorch_trials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8a9493-13cf-46b6-b0e2-7bc7f2d53cb1/1507861062.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/sample_flyer_templates_word.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_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 5512 bytes
SHA-256: 0cebecba4a6de6f89844dc3558bd62995713acb992664f1f61b303c68f729784
font_01_sfnt_off00010dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC0 11048 bytes
SHA-256: 145ce51834fdbc25b775012ed93a5a6e3a3a3c660f330fdcb3ce208b8ca3c5f5

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