Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dba3a6c5825d2f…

MALICIOUS

PDF

84.1 KB Created: 2021-04-28 22:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b638035d900d3012b873de207fac8896 SHA-1: 75c1cc15b5b0ba9ac4ffb2e8685fff3d0ac6b2a0 SHA-256: e2dba3a6c5825d2f08c3eef79f00f82ac9f534c70bc71c471a31cd969f7656c3
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 0.9990

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://zajinet.ru/strik?utm_term=bryant+plus+90+furnace+ignitor+replacement PDF link annotation
    • http://lewodozena.22web.org/wufutofevasexuwabaguk.pdfIn PDF document text
    • http://circulshtangcalip.website/81835324262ooeat.pdfIn PDF document text
    • http://bobutukaboxavaj.iblogger.org/the_authoritarian_personality_book.pdfIn PDF document text
    • http://cheapkeys.site/how_to_deal_with_distant_parentsmublo.pdfIn PDF document text
    • http://recepty-dd.info/vertical_and_adjacent_angles_worksheet_answersosvr5.pdfIn PDF document text
    • http://bulepozobagepud.mygamesonline.org/45883037963.pdfIn PDF document text
    • http://bonifacy.site/meant_to_be_song_ananyakatol.pdfIn PDF document text
    • http://akb54.ru/lipujuriwekjgpma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rovoviniv.rf.gd/pdf_to_dwg_converter_free_download_with_crack.pdfIn PDF document text
    • http://pigimefupe.epizy.com/62476668158.pdfIn PDF document text
    • http://jejemizon.rf.gd/81360432863.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/queen_bohemian_rhapsody_piano_notes.pdfIn PDF document text
    • http://titugol.atwebpages.com/certificate_of_participation_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad47fba4-9c34-4e5b-a887-37c4d6a7a9fe/61581765360.pdfIn PDF document text
    • http://fiverulaw.rf.gd/nidekomedezolomaxatedoze.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/qld_herbarium_specimen_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2227da-738f-42ae-b873-238782d3de31/kaba_simplex_combo_change.pdfIn PDF document text
    • http://jesebikalag.epizy.com/basic_medical_biochemistry_free.pdfIn PDF document text
    • http://derajovaku.rf.gd/how_to_connect_to_an_arris_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0131ec4-3442-4bf7-9b5c-89de8bce0cf2/27643638035.pdfIn PDF document text
    • http://silinodev.rf.gd/33563752685.pdfIn PDF document text
    • http://mekavebij.epizy.com/ansys_mechanical_apdl_book.pdfIn PDF document text
    • http://riveminigokoxa.myartsonline.com/42090133796.pdfIn PDF document text
    • http://dovovefuwaxav.epizy.com/dosamiserugawuveragin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA88 5664 bytes
SHA-256: 99abdf4d099b49a232e2d0eda6b145e9fb5d1ad08ecac1ebc4e9b543a8e207fb
font_01_sfnt_off00010dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBD 11340 bytes
SHA-256: 5ea844177a1a156a942589f2d62d0c5c503b18def2309968489a452b589094ad
font_02_sfnt_off0001343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c