Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b904ce7238dca0…

MALICIOUS

PDF

117.8 KB Created: 2021-01-14 04:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa3d10156cf1020a83f522d6ca27f5c9 SHA-1: 85dc42e8bf51bad21d3d5377cd8adbbc61cce29e SHA-256: e4b904ce7238dca06adaacede92515162a3ee256c982e5d4686f8d640ba7b6be
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a link to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document's content is designed to trick the user into installing remote support software, a common tactic for gaining unauthorized access. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://traffmen.ru/aws?utm_term=ijazat+video+song++djmaza In PDF document text
    • https://site-1168140.mozfiles.com/files/1168140/gacha_life_songs_list.pdfIn PDF document text
    • https://site-1244851.mozfiles.com/files/1244851/zukufedikazuwabolevaxu.pdfIn PDF document text
    • https://site-1202636.mozfiles.com/files/1202636/japegubemufivenop.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/LmheihV/vocopro_microphone_battery.pdfIn PDF document text
    • https://site-1178101.mozfiles.com/files/1178101/69944493203.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/midipes/matlab_for_engineers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/formation_carreleur_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/aylesford_school_sports_college_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/administrao_financeira_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/html_form_tags_and_their_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/sanabuxesetalojosinima.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_off00019092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19092 5140 bytes
SHA-256: a3563dadc36980001c3cdbb06c610730d995949a7a448556396ee8a854c9ae31
font_01_sfnt_off0001a21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A21B 12100 bytes
SHA-256: 4b6ee2ff8241ed02ae63b77323859ff0a88241ce4eaa6ced88aa6b563fef1b7a

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