Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f532cdd6acf20d3…

MALICIOUS

PDF

80.9 KB Created: 2021-03-17 06:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ef0b21bfa728a8cb51e2c34a5ace17de SHA-1: 20a87562490d515ed428ab100f7d6c4c072771e6 SHA-256: 2f532cdd6acf20d3792c8f10b31959c75e265d394d811f84b8ec0e1beb9618ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to domains associated with phishing or malware distribution. The document body is obfuscated, but the presence of a critical heuristic for PDF SEO link farms and a ClamAV detection for Pdf.Phishing.Trojan indicates malicious intent. The primary IOC is a URL that appears to be part of a phishing lure.

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://druttle.ru/strik?utm_term=how+to+install+oracle+12c+client+on+windows+10+64+bit PDF link annotation
    • http://forovasax.medianewsonline.com/all_physics_formulas_igcse_cambridge.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/13232343728.pdfIn PDF document text
    • http://nudistoff.club/age_of_empires_2_hd_multiplayer_without_steam5ev7c.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/cellule_animale_et_vgtale_diffrence.pdfIn PDF document text
    • http://chambrehq.xyz/2379562398405yr9.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/nasekulab.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/mafanosebilutu-rekizudub.pdfIn PDF document text
    • https://navubuxodogonid.weebly.com/uploads/1/3/5/3/135327143/3d1499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/carcinogenesis_mutagenesis_case_reports_cmcr.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/que_funcion_tienen_los_medios_de_comunicacion_en_las_relaciones_interpersonales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4443dc9-13fe-435d-b344-7a28a86fc4ca/72321332859.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/how_to_connect_my_vizio_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd381070-2369-4289-9b64-96e268817a52/fodmap_foods_to_avoid_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/dd_monster_manual_3_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/free_niv_bible_for_iphone_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fad894-a956-403e-8d96-26c5843baf7d/black_and_decker_16_cup_rice_cooker_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/nokajumewexaw.pdfIn PDF document text
    • http://sadoboxijowem.myartsonline.com/25824269255.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/disufegiwevavogatujepuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/kenexa_prove_it_excel_2016_test_answers.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_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 5692 bytes
SHA-256: cc165dbdfec46894a0b82d6ea0ac23fa1679d0e9e5d9b9f9f85e94d03c98c713
font_01_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 11220 bytes
SHA-256: 0fc8401456231bbe1b33b8b4eec1526606522807e3134840554001cdde4fa5d4

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