Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8e91d353e773de…

MALICIOUS

PDF

75.0 KB Created: 2021-04-01 13:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f47741684bcc3da704cfd3921e4027fd SHA-1: 58b039fbfaba993414287d3833397dffbc69a15c SHA-256: 0a8e91d353e773def349f6b9988051494e33db2335d2eac0a23edb188c12c1e6
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 0.9992

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/strik?utm_term=polaris+ranger+glacier+plow+system PDF link annotation
    • http://xosubowavenu.mypressonline.com/atlantis_water_park_map.pdfIn PDF document text
    • http://woodbonus.net/hallelujah_chorus_from_messiah_eraeak15.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/world_cement_production_2020.pdfIn PDF document text
    • http://zathkatow.xyz/zepepegegapejakowtuas.pdfIn PDF document text
    • http://avbox.org/39185608296w7x5p.pdfIn PDF document text
    • http://opensalle.xyz/kyocera_error_1102_windows_10mg7pl.pdfIn PDF document text
    • http://luminar3-download.xyz/linden_mantel_clock_instructionsx2tex.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/sixozaged.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/18833ce1-9746-4e8b-a78c-f5efd427560f/zugixuzet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd008e50-0f17-4e04-88dd-6b1cc7ff10a6/2012_dodge_avenger_transmission_issues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84eeb1a0-d647-4b54-94cc-4d44b0ce94ce/january_2020_game_releases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755c5fc5-393b-47c4-b622-cee7c2f457fe/harvard_business_review_educator_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9dd449-6abb-4ebf-86c9-e6a718d94f49/what_are_some_physical_properties_of_seawater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e50842a-5f52-4aa1-a38a-4fbe84b2e168/boxotanizuwelilobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f507f05-6501-4a4a-a4c9-66af8d0d55f4/50324846589.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/92969913084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a774be-fc4b-4e48-b735-3669604c1983/tecumseh_13_hp_engine_surging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd520aa-c46c-49cc-be05-f9fe66873fb3/how_to_write_a_good_conclusion_for_an_informative_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681f7715-aee0-428a-8ae5-9d9c64acfd9c/dadivemuxiduxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b4e810-0b9e-40ea-b8c8-736e006cb1ba/dell_mouse_ms116t.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad0e7cb-a225-4354-a788-b30eca8ce3c6/canon_xh_a1_video_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc80ef3b-93b4-4356-bb36-2ddfe250eecc/bosch_dishwasher_silence_plus_44_dba_not_turning_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85027dd8-4707-4a92-9a56-d1d68b70dbef/sesolesenizo.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_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 5448 bytes
SHA-256: 15eefa407fa2e40fd59a59456011266069f6e814c6c4766e3da245b173734395
font_01_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 10876 bytes
SHA-256: ecd30c9bebc6f44d7ddbca29a39016851dac615bf7e845ea12c4e4a2644c999f