Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ca1842e9c8a751…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 20:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 373c9d7e7dbb9f7ffaa03b3449ea4159 SHA-1: 53689483177dfaf31183a7ba27397284a172b6d9 SHA-256: a3ca1842e9c8a75108abea3f2566ddabff0cd5117d20b6f16f75743dc93a7d39
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://resalured.ru/strik?utm_term=is+ezra+in+love+with+alison' is a primary indicator of this activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://resalured.ru/strik?utm_term=is+ezra+in+love+with+alison PDF link annotation
    • https://cdn.sqhk.co/viwedanej/6giaiND/archipelago_candles_stonehenge.pdfIn PDF document text
    • https://dekajemo.weebly.com/uploads/1/3/1/4/131453049/xewomazej.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/3539203.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/aerodrome_design_manual_part_3.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/algorithms_robert_sedgewick_4th_edition.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/altivar_12_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/pofadugilip/hY9jaxx/44607533539.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/187340.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/334169.pdfIn PDF document text
    • https://folitovuf.weebly.com/uploads/1/3/1/4/131406115/tedunuwilurofaxin.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/ij8igfd/16616212785.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/7f4ca22b-fd55-48a2-8c05-b6bea73ef9e1/nelson_stud_welder_gun.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/migisuvasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc1c2bc-6951-4630-878e-d2713595c788/nagunabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc1a612-d271-4382-b824-e77837a55deb/how_to_draw_classes_online_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c567be9c-441d-4d48-a924-9eba8a29f33e/microsoft_project_2013_free_download_with_product_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec20abd0-1bfb-433b-a990-4114c6db14ad/chatal_band_mp3_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10827afa-9a14-4c52-9d33-7795b623f496/67961081887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac06bdb-3d8d-44a9-968f-09b7508124a1/25107416507.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_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 4912 bytes
SHA-256: 7ab8b3b1b1ececab8815f356bc7771333df0497e6cf99613e51fd560e38ef9db
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 10384 bytes
SHA-256: 86d5cfe80e2abfeb11e81475812b981b4342eeeb731f344026924b54429f0bc6

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