Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f5509d2b20d1d6…

MALICIOUS

PDF

89.6 KB Created: 2021-06-13 22:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 70e8f0f48c7b9440321ab2bf0b616803 SHA-1: 05bd8bd4fdecb2d7a2f4f2c75a89bd7ccd666ffe SHA-256: c7f5509d2b20d1d6a647ba3ff950f44a20991fb4dd0658482f8d648707c47274
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 embedded URLs, many pointing to disposable hosting services, and the document body, though truncated, suggests a lure related to 'Year 5 maths test papers printable'. This indicates a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pistant.ru/pbw?utm_term=year+5+maths+test+papers+printable PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4371808/normal_60b015062d3f7.pdfIn PDF document text
    • https://feselezoretun.weebly.com/uploads/1/3/4/6/134690260/1282519.pdfIn PDF document text
    • https://neliwoxe.weebly.com/uploads/1/3/4/8/134871618/37f3c53865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5fd8b221cd403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407784/normal_5fec8a1b079ca.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/lasiwejukoteze.pdfIn PDF document text
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/1567611.pdfIn PDF document text
    • https://luralaxigagu.weebly.com/uploads/1/3/4/8/134868525/kodemeko.pdfIn PDF document text
    • https://bowasizavaxilek.weebly.com/uploads/1/3/4/0/134042597/bunuxukaligas_pusopeleleneta.pdfIn PDF document text
    • https://gulatavinijigu.weebly.com/uploads/1/3/4/5/134507109/4395643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_6069f7c5e9630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144499482/wilomilepebeviko.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144600879/97821929445.pdfIn PDF document text
    • http://posonuxe.pbworks.com/w/file/fetch/145171941/harivarasanam_download_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b7cdff-1d0d-406b-ab75-80a7ac8639cf/xetikajulusubefotemozogip.pdfIn PDF document text
    • http://zaxovaleso.pbworks.com/f/lego_star_wars_the_clone_wars_all_red_bricks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a00d32b-9b7f-4c50-a574-3b7afee34603/what_is_the_antonym_for_lonely.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0712f43f-e6bf-4b7e-ae82-3736a9a3a82a/vegilotamirugigas.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426852/punctuation_worksheet_for_class_3_with_answers.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/crows_zero_2_full_movie_eng_sub_download.pdfIn PDF document text
    • http://tijigika.pbworks.com/w/file/fetch/144566295/quadratic_equation_questions_and_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_off00012217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 5284 bytes
SHA-256: fc081e80e14cf616c3fe56837be99fe5b3be1e54c3c87e5ad5d47cdd51275e78
font_01_sfnt_off000133e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E6 11008 bytes
SHA-256: db3d9276ee98e719362f2e2ec00f7834bb4c57735867e8d00f06463680e75d3f

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