Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d302348ef2347e4…

MALICIOUS

PDF

89.7 KB Created: 2021-02-03 07:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3b5cf1db88d86cc4977a0ce4f6974b2c SHA-1: e89b457a5c0641ef3062d5829c6bf172c9c2c87f SHA-256: 7d302348ef2347e44fec491b37c7da4370f3be649fb33ad770accf23b7728a93
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely intended to host malicious content or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure.

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=sasural+simar+ka+characters PDF link annotation
    • http://wopedejani.iblogger.org/anatomy_book_for_nursing_students.pdfIn PDF document text
    • http://se-mrush.com/kiss_the_rain_piano_violin_sheet_musicdf22i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5fd9d7523497f.pdfIn PDF document text
    • http://nagajavanof.22web.org/acrobat_reader_android.pdfIn PDF document text
    • http://segwaywheelchair.ru/54955166582j3y5u.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/geXz1if/most_interesting_stories_in_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_5ffd1a78bd9e7.pdfIn PDF document text
    • http://qwert-ita.fun/soulfa_free_group_voice_chat_rooms5vp2v.pdfIn PDF document text
    • http://discount50it.pro/guvizujujewogacgpc.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rerinago/kevovezokeloligu.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/alleluia_sing_to_jesus.pdfIn PDF document text
    • http://nexizali.epizy.com/bihar_board_marksheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/belajar_membaca_tanpa_mengeja_buku_2.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/jojedumemoxoropuxisegeni.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012370.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12370 6256 bytes
SHA-256: 2c076438a20fb1a32e098681d3720106407da14043feb58123b2a8e0e5fc1077
font_00_sfnt_off000111f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 5208 bytes
SHA-256: 806a6e54cc7c0aa6b21acfd3c7df7fd876a4703fced7da9128198c88c34cece2
font_02_sfnt_off000133ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 11056 bytes
SHA-256: a727a9cf9b65adff3ce175763be58f935c9224c9b437304c82d2abaf1418b418

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