Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bd26938b0076aa…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 09:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5d23c029b1f5e33388c66d98ab7f18d0 SHA-1: eb6f81a597abcc788c3e12861c1b96f0f5284a94 SHA-256: 28bd26938b0076aa5a01ce77c6a3f9f1f8ceaafeb079b8ae7fbbbbeae389726f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/123?utm_term=black+pits+2+guide', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, suggests a 'guide' context, aligning with social engineering tactics. No scripts were extracted, but the presence of external URLs and the overall malicious classification strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=black+pits+2+guide PDF link annotation
    • http://reform-st.ru/32362753744cee5h.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/hbibU6m/41116317060.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/vVWifjf/carnival_games_rental_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/oFU7zjh/university_of_montana_football_roster_2012.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/6rgisAR/cardboard_playhouse_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/hiiVhbd/natitekogupaweketedatuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/fT94iiw/milekalaroju.pdfIn PDF document text
    • http://shopsupergood.site/advanced_dungeons_and_dragons_2nd_editionwz1hl.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/hdwfBha/stock_trading_simulator_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/nie2lgh/gedomusas.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/drOjgge/pulugafomivipixe.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/ftdjihh/crossfire_wallpaper_1280x1024.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/e2l1heS/51531235167.pdfIn PDF document text
    • http://mamontov-net.cc/303365758557htoz.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.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/29b7daef-4e2e-4ec7-a51a-3d64a41aa29f/best_machine_learning_books_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b96c5d-bea2-4884-b8ff-c25ec52659a6/37767804092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24384ebf-8e7d-48c8-bce5-17ee61915297/how_long_is_grieving_period.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a97e17-37c5-49b5-be3a-754ad8550edc/revugabamujibagaziwe.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/saxaboxeje.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/11314506006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ec9645-4b09-4f7d-a8d6-99e1aa416d4c/words_that_start_with_kim.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_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 5388 bytes
SHA-256: b9ba220c877108f6956e064b8a56e450faa07f209a1a34159c96be63d1270b8f
font_01_sfnt_off000107dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 11208 bytes
SHA-256: 0e1f762d6cad74dd6d2201b71bc36ebc1728dc21e3ee0795e7f2359f6e187c5f

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