Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3e17bb2535a06b…

MALICIOUS

PDF

77.1 KB Created: 2021-04-08 03:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71ba495900aea10bae596146349730c6 SHA-1: 770b4c3951be339c14593f7e83671b4fa767ce13 SHA-256: 9f3e17bb2535a06be6c46dc073ba8e03cbb197e7ac9859b692c4d99113314434
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious external website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a game ('Combat 3 unblocked').

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://pelibifir.ru/wix?keyword=combat+3+unblocked
    • http://jonotijero.medianewsonline.com/54996859245.pdf
    • http://jitokinut.iblogger.org/13533561559.pdf
    • http://makebugobiwuka.mypressonline.com/34131981567.pdf
    • https://cdn.sqhk.co/goropakuvoge/2BjgAMO/head_soccer_championship_unblocked_66.pdf
    • https://cdn.sqhk.co/rejoxapuzopa/icZ4BSz/constitucion_politica_de_guatemala_2018.pdf
    • http://xariketixagat.mypressonline.com/57444557963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gaxodusipif.epizy.com/online_application_form_pup.pdf
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_818db707a12d468cbb65f06d47f69574.pdf?index=true
    • http://vuzadelulamow.rf.gd/55336196298.pdf
    • https://uploads.strikinglycdn.com/files/3e84fe7d-4275-416d-946b-9077af2e415c/woredavupaxaganivawo.pdf
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_a637dd027d4e49f3ad3a39e9998f75b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4038164c-b492-4c70-a199-08477c158744/82047547115.pdf
    • https://s3.amazonaws.com/jizubisetebof/75715503605.pdf
    • https://s3.amazonaws.com/wovugi/case_work_format_in_social_work.pdf
    • https://s3.amazonaws.com/luborinizu/72672001268.pdf
    • https://s3.amazonaws.com/nigimul/rascals_full_movie_in_hd_720p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d4.bin
9199afb8a2703b751400aef07c311340769b70e4426a2ba7c0adbc6d2c1f6699
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 5036 bytes
font_01_sfnt_off0000f3e1.bin
0f50791e9ae361c35344e94c18ea47cbfa73367c9c0f1d0f999ce8b66e47c683
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 11112 bytes
font_02_sfnt_off000119ce.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x119CE 4324 bytes