Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d50b5232fcf5369…

MALICIOUS

PDF

84.2 KB Created: 2021-05-05 21:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d618d17640356d2ae2467d6d8f8f1ecb SHA-1: 7d35d3b069c4573fa0ba4d4fff9ece597e2954db SHA-256: 0d50b5232fcf5369c190331ce0e7cb3496ae967d2b57cf1903d6eba40f0491fd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=habits+of+the+heart+by+robert+bellah PDF link annotation
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/xamoxixira-fanusiti.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/8942686.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/9113123.pdfIn PDF document text
    • http://btsworld.org/the_book_of_unknown_americans-gradesaver3dp45.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/consonant_blend_worksheets.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/relukozogumonel.pdfIn PDF document text
    • https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/peditubun-ponup-negumevi-ratidejem.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/talovaxozukikaxo.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/empirical_mode_decomposition_matlab.pdfIn PDF document text
    • http://openlait.pro/what_stretches_are_good_for_flexibilitys5l1r.pdfIn PDF document text
    • http://stassikorskyi.com/email_verification_mail_templates5qba.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/vukubelahdgm0.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/aadhar_card_by_date_of_birthbz0do.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/buku_belajar_membaca_anak_sd_kelas_1.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/datarofapakil/hangout_link_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383bf720-dd5a-485d-a21a-4eae338c5a0b/browning_a5_wicked_wing_tungsten_bottomland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6edb561-cdf5-4812-ba59-0c40410e9c51/26928599693.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/zilezijajigufipevubifiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb21c72-76b5-4b80-b723-de5199b9b105/sueo_de_una_noche_de_verano_silvio_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5957a397-e430-472c-900e-ab79f1643986/50383595951.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/diablo_2_patch_1.13_d.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/blackstone_fortress_40k_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c1c058-93f1-4050-be7b-6762c685b861/what_is_the_biological_theory_of_depression.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_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 5060 bytes
SHA-256: 6dd30c45962520e4aefcedf890b6fca0a751ac1d2079d7dfcb6e60f2dbfe1200
font_01_sfnt_off00011c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 11376 bytes
SHA-256: 926aae339403641828a738be1a01e439dba7b4fdbb89a621d0614cb1d8a8e926