Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f1a89d6dbc199b…

MALICIOUS

PDF

74.8 KB Created: 2021-02-26 22:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7937cc3023e7f5ce6dda789d3e107f46 SHA-1: 595564e6c15c516e54572c59154b34f9fa32ce12 SHA-256: 57f1a89d6dbc199b526051a5da645fb4b651f1c23873a6ea4e3d86b447b36579
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 appears to be a search result for free Fortnite accounts, a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=fortnite+accounts+for+free+mobile
    • https://cdn-cms.f-static.net/uploads/4470985/normal_5fd7862f43da0.pdf
    • http://mitutepoka.medianewsonline.com/rem_1187_review.pdf
    • https://cdn.sqhk.co/gebijowokobe/gjfaibj/xalasom.pdf
    • https://cdn-cms.f-static.net/uploads/4453102/normal_60154683d6476.pdf
    • https://static.s123-cdn-static.com/uploads/4491151/normal_5ff9f1d7752b1.pdf
    • https://cdn.sqhk.co/ledivure/gcNSEAJ/hot_air_balloon_dog_costume.pdf
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/dabesubuxu-tuvidej.pdf
    • https://cdn.sqhk.co/veletafi/jgqlO12/new_english_songs_2019_justin_bieber_with_lyrics.pdf
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fcc28e9727b9.pdf
    • https://cdn-cms.f-static.net/uploads/4477400/normal_60290927105c7.pdf
    • https://cdn.sqhk.co/pinofizulag/pjaXrji/mod_among_us_ios_always_imposter.pdf
    • http://zonizubiro.getenjoyment.net/what_is_the_newest_ps_vita.pdf
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/zalovarusavodapirade.pdf
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/viwemowegesomat.pdf
    • https://static.s123-cdn-static.com/uploads/4488806/normal_5ffd7176517d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mujawonevafo.rf.gd/kofarimeganekilodogon.pdf
    • http://wutejaxevewef.myartsonline.com/mipizobigaxomipeduveki.pdf
    • http://zejibanunepi.myartsonline.com/panuje.pdf
    • http://xodenumaverap.epizy.com/bozivivaluzukiz.pdf
    • http://badiwofotafazol.epizy.com/3m_78_spray_adhesive_data_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e808.bin
562f5aa00a068aa6d5bac4adbf9f3d7feb854e0c7cbab474106c31c6c0450b79
pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 5124 bytes
font_01_sfnt_off0000f961.bin
9e16456222e3c3c6b5f4e3d0c1e745e8fbb71f37d47ab736b90df0b7848d98cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 10640 bytes