Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89cc33653347561…

MALICIOUS

PDF

102.1 KB Created: 2021-04-19 03:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e2b3f3e9f7b94b1edafed4c616b056e SHA-1: 58e108d01a9c62974c157082502dab9cfa7ba0d4 SHA-256: e89cc33653347561281be878ca8017e6a8e72b02034fd0879864407ccd9c91be
126 Risk Score

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 0.9961

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://crophysi.ru/strik?utm_term=where+to+donate+used+mattress+in+singapore PDF link annotation
    • http://moradudipomibo.mypressonline.com/99460120664.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/cpjixST/33120578835.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/GcQgeib/poblano_peppers_nutrition.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/poxifujotumefan.pdfIn PDF document text
    • http://wawejamivejaxu.22web.org/trumpet_sound_effects.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/pathophysiology_of_bacterial_meningitis.pdfIn PDF document text
    • http://noturufupama.iblogger.org/antimicrobial_activity_of_benzimidazole_derivatives.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/manual_citizen_eco_drive_e870.pdfIn PDF document text
    • http://josogub.iblogger.org/4855469104.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/41816273040.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/49060381866.pdfIn PDF document text
    • http://mitezafefuvaje.22web.org/teamviewer_14_for_windows_7.pdfIn PDF document text
    • http://lulamugateso.mypressonline.com/40614277692.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/hchjuge/xasewovigibosej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://maguzudag.epizy.com/bandler_nlp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d51d7f3-036a-4a71-8b34-4d2004be6517/used_john_deere_lawn_mower_parts_mn.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/protocol_clarification_letter_template.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/xaxivazajulam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0512efa0-b5cf-4890-9ac0-c9e6e30fbe1f/what_kind_of_oil_does_a_troy_bilt_generator_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae7d66c-8df1-46f5-b9d1-e11d213a268c/dopowugedinas.pdfIn PDF document text
    • http://tavupikegoseri.epizy.com/plant_high_school_calendar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f57a017-5edb-4dfb-937e-5fcd1fae976c/bamabewosowufuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae165ca-7f92-446c-988f-cf29c426fdac/42354904828.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://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 5188 bytes
SHA-256: ec862cb1c3d1d256b3ac6f786cea6f39f5518a2847709a9194acf85f6dd82088
font_01_sfnt_off00012dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAC 5356 bytes
SHA-256: 35647b254acc36f061fe3cdd10e0df949823fdd6c207d8c29bb68d6a27aace70
font_02_sfnt_off00013fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBD 5084 bytes
SHA-256: 4077966d0efa669208aca27522dacbd98d399120cbffe5b1bfb9ec3990cbddc6
font_03_sfnt_off00014eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EED 6924 bytes
SHA-256: d291fce74728da5a9f38966cab7de286aabd4bc7cac52fb12f3c8b86c8f96ec3
font_04_sfnt_off00016183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16183 12380 bytes
SHA-256: a6e243c45ffd5a434ab23e29c07b7666e46302b9ac9076220efa8dea7613e2e1