Malicious PDF — malware analysis report

Static analysis result for SHA-256 5239c67e787ca10d…

MALICIOUS

PDF

76.4 KB Created: 2021-05-16 15:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a04c8b260e6ae25d5dd263bb1ce18cc1 SHA-1: ddcd28774a67db905a01e54d12a4c36e2bced548 SHA-256: 5239c67e787ca10dbdb11ee05048b33db33d8386064293fbe7457f731845b396
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=sunforce+solar+motion+security+light+with+100+led PDF link annotation
    • https://cdn.sqhk.co/josurowelimu/dCzgde3/floor_puzzle_heroic_zero_hour.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/gfijgiH/lara_croft_go_mobile_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/duc6cjj/deteweguwur.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/igcidEW/divitifuzuji.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/epsENk9/tofofogare.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/he7jjgj/evacuation_map_sonoma_county.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/62OuFha/pokemon_go_promo_codes_september_2020_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/iijhghn/degobalewuxilalos.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/Pidkrhc/beats_headphones_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/hhCK5Qd/famous_telugu_movie_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/gf02I5Z/rt_america_news_with_rick_sanchez.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/h4Siyji/space_engineers_ion_vs_hydrogen.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/9e604307-0a5b-4567-b2ab-c15ab85587f8/kigigerokufiwabisud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3366946c-adfa-49be-93fd-8dea60cdf2dd/what_is_the_c_flex_on_a_cpap.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/english_premier_league_fantasy_cheat_sheet.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_aa8c2af6dc254d4ca222632f1be1105f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/12461623483.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_91ce287b3d534c1b8298df70519b2288.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af411583-e464-4732-80c4-ec249961474e/36427935443.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_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 5928 bytes
SHA-256: b335065adeb95bef68ba84d7f6c92de438806fa82132e2b0d209f5359c0de4cf
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 11308 bytes
SHA-256: f2a06388f7e19f1bcc05a0a7a50725a383559db53bf1db84fa628e0ec6469d80

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