Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae396bf3c806d1e9…

MALICIOUS

PDF

74.1 KB Created: 2021-02-22 21:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 974045fbec470081a29374b5ff14b9b7 SHA-1: 3e851f14d892f8feba3d02e0e75e964d0427805e SHA-256: ae396bf3c806d1e9d11fe0b7b5b36be4cc66127b880dd7c9c8848c949a0d26fe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of the file. Although no scripts were extracted, the presence of a malicious URL and the overall detection profile suggest an attempt to redirect the user to a harmful site, likely for credential harvesting or further malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=where%20to%20get%20free%20food%20on%20your%20birthday%20in%20dallas In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb90303abda.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/YrtShjM/new_bottle_flip_3d_crazy_games.pdfIn PDF document text
    • http://ridisasumuxa.22web.org/12555214624.pdfIn PDF document text
    • http://voduvalegef.66ghz.com/mavobap.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/JUjdIuo/free_streaming_music_for_twitch.pdfIn PDF document text
    • https://cdn.sqhk.co/wametofenuwo/gY3hc0M/mowiguvebu.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/godewumazek/why_is_my_portable_humidifier_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/59272690221.pdfIn PDF document text
    • http://dodigemadepa.epizy.com/snaptube_app_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/hd_movie_website_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/android_games_for_online_play.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/broken_vessels_piano.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/2019_nfl_draft_grades_bleacher_report.pdfIn PDF document text
    • http://welidigukiru.epizy.com/vajefasisamazajezetap.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_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 5424 bytes
SHA-256: 839436f27481918c1b8a7546f338fab2edb917deb09209156e0380dd459e8449
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 10996 bytes
SHA-256: 9b52b7d9917148e615e7a44b065612f65a31d813d4aab5ce6b2b2854af2c7ed7

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