Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c49451646ec844…

MALICIOUS

PDF

90.6 KB Created: 2021-03-21 04:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 41228bfe4794a823f45bbc5827f01913 SHA-1: 150c8cabb57311b50c42cae851f23948b6a18d06 SHA-256: c9c49451646ec844bc31648282f3d450be45fb8b6097831e6f3e26c20e241f17
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 0.9997

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://xezojetit.ru/award?keyword=autoclaved+aerated+concrete+blocks+pdf PDF link annotation
    • http://dizurexemubegog.mygamesonline.org/keguzogupotita.pdfIn PDF document text
    • http://wowitaly.space/60953697612wcl9d.pdfIn PDF document text
    • http://premium-cinema.com/12000989154vdg5p.pdfIn PDF document text
    • http://tryraisins.club/53253513680vz87a.pdfIn PDF document text
    • http://maleev.online/vuxokikopavu5hrmd.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/new_york_times_crossword_puzzles_answersei7b9.pdfIn PDF document text
    • http://kamini33.ru/flannel_sheets_that_won_t_pillak2q5.pdfIn PDF document text
    • http://heartcenteredequestrian.com/the_archers_bbc_soundszl33v.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/contemporary_nursing_issues_trends__management_8th_edition_apa_citation.pdfIn PDF document text
    • http://mivetys.xyz/tidomirudogelawokudaku7k8oc.pdfIn PDF document text
    • https://gemirolav.weebly.com/uploads/1/3/1/6/131606407/8858449.pdfIn PDF document text
    • http://mirror-x.org/vugeparp1g7j.pdfIn PDF document text
    • http://aduo5.online/39810376063l4qu1.pdfIn PDF document text
    • http://storeeu.info/rirotekuweberedosim8n926.pdfIn PDF document text
    • http://getsalle.xyz/58108426157d6iqg.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/db73fcf8-80cf-4b9f-a535-d444e2ba6d33/how_to_translate_chinese_site_to_english.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/aggregate_demand_and_aggregate_supply_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc19a08-f599-468d-91d0-6e5a4cbd607a/lenudoxobumotemozixuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81311edc-80d5-44e6-a7c3-b97eb53f0f9e/craftsman_8_gallon_wet_dry_vac_accessories.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 5400 bytes
SHA-256: eb49ed65310dab02c730090f79c2ef46dbb45457d21a20f18fe0fb9b0b264675
font_01_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 12240 bytes
SHA-256: a637eabda67b4fffc074820a0f4f1635fa272cbcb19a73f0a44f592906a71d09
font_02_sfnt_off0001460f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460F 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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