Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaac1be79f166a6…

MALICIOUS

PDF

77.6 KB Created: 2021-03-27 16:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f43343cb57f8756a3f05407eaacda2 SHA-1: 85b48d4aba75e8f6b80952cb83464fb59782830f SHA-256: 3aaac1be79f166a601236471653c0c29dc06de01b8c896ec009599931e002ba4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that advertises a hack for 'Angry Birds Epic RPG'. This suggests a phishing or social engineering attack aimed at tricking users into downloading malware disguised as a game cheat. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the embedded URI is the primary indicator of the attack vector.

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://zajinet.ru/wix?keyword=angry+birds+epic+rpg+hack+apk+download
    • https://static.s123-cdn-static.com/uploads/4384160/normal_6006733519ddc.pdf
    • https://cdn.sqhk.co/runenuti/a9VsRja/apple_watch_series_6.pdf
    • http://silujokiz.mypressonline.com/rasefodopirokobewuset.pdf
    • https://cdn.sqhk.co/gujurolekuma/ijahfCo/20931566539.pdf
    • https://cdn-cms.f-static.net/uploads/4478125/normal_602586cfd7d52.pdf
    • https://cdn-cms.f-static.net/uploads/4467577/normal_602ce4c092c0e.pdf
    • https://static.s123-cdn-static.com/uploads/4374380/normal_60083b4278e56.pdf
    • https://cdn.sqhk.co/janawezexoj/e4ijThh/kekejolulasubeduj.pdf
    • http://dotenipago.medianewsonline.com/ninepivol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_15266c6b036a43199dcb6f0a00e2e0c8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b641ad63-4434-4a6f-a410-d9182b4321a5/ge_spectra_gas_stove_oven_not_working.pdf
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_167f7960608b492491a6c44fa1a240b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bf689505-9d0b-46d2-b958-f9996c7c9918/furasun.pdf
    • https://s3.amazonaws.com/paxuvagal/gosidiwujexipagodilejoxuf.pdf
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_42a16dcd89f64f509fe520f10ee74ed5.pdf?index=true
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_cb021609e1804221b30b10cc6d31648d.pdf?index=true
    • http://rixuroruwe.myartsonline.com/appium_tutorial_java.pdf
    • http://lerumedinopox.onlinewebshop.net/boi_dd_form.pdf
    • https://uploads.strikinglycdn.com/files/448808fb-6cc0-450f-8dea-33402aa1e044/ramow.pdf
    • https://uploads.strikinglycdn.com/files/33bbef31-84bb-49ba-ad4f-c000f9be0ff0/why_is_school_readiness_important.pdf
    • https://s3.amazonaws.com/nedijowewoded/bluestacks_3._56_android_version.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_off0000f0de.bin
4b1999a43c0fbd91ad68b763bb9fd5978a612b6c2d4933ef94ef54eb68727496		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 5720 bytes
font_01_sfnt_off00010467.bin
ba1b8850b5640399a26771e0c25c00ab1ea91e7cde63cd5c915ce6e361768e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 10672 bytes

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