Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d1ec060fbdbe28…

MALICIOUS

PDF

76.9 KB Created: 2021-02-12 04:29:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 642acbdf9a0ab6bd451cac74616bca14 SHA-1: 02b47fc3df619bfff1a6b3bd73dc60df2542d98c SHA-256: a3d1ec060fbdbe28010564cf4313adb85387583b8c986907200a6d83ea00256d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result for a free academic book download, suggesting a social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=from+inquiry+to+academic+writing+4th+edition+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fe6b1496f5eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5ffaa299b22f0.pdfIn PDF document text
    • http://makipoduzoru.22web.org/betiya_song_pagalworld._com.pdfIn PDF document text
    • http://sigonalen.22web.org/frases_completas_en_ingles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe81a34836a7.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/moduluzuxikari/cadence_virtuoso_ly._ir.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/vivavufitowawoxob.pdfIn PDF document text
    • http://vezoxonu.epizy.com/59538080910.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/best_hd_wallpapers_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/assumed_name_form_dallas_county.pdfIn PDF document text
    • http://bejuwenaja.epizy.com/equine_acute_abdomen.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/lowelu.pdfIn PDF document text
    • http://foduwisidowej.rf.gd/analgesicos_lista.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/70164479536.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/wexanasasujusilitavug.pdfIn PDF document text
    • http://lumigetutiburu.epizy.com/prema_tora_badmash_odia_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/wewefazu.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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5756 bytes
SHA-256: 6feeb2e54b91529237604adc42dabddf6776c0618bbe0494d85a50f52cab618f
font_01_sfnt_off0001020a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020A 10560 bytes
SHA-256: 6ffe13ebbd6ee3be1b4bcb537a2ee8a96584d6e40de1f38bbd8ae4b4e0ec8462

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