Malicious PDF — malware analysis report

Static analysis result for SHA-256 787d598f78e19393…

MALICIOUS

PDF

72.7 KB Created: 2021-03-20 07:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 622f8ea2e8de34603e1c82c27c4ee3b4 SHA-1: 5898bb72b5de944f58f039a15c0b72ab8cc6fdd3 SHA-256: 787d598f78e193930bcc17fe83a28f510da8267c399b84b37a6ef96666410f51
96 Risk Score

Malware Insights

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

This 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 'https://golowaki.ru/wix?keyword=achilles+the+game+unblocked', suggesting a lure related to the game 'Achilles'. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF versions of web pages. The presence of external URIs and the ML/ClamAV detections strongly indicate an attempt to redirect users to a malicious site.

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://golowaki.ru/wix?keyword=achilles+the+game+unblocked
    • https://gawopina.weebly.com/uploads/1/3/2/8/132814119/sazuninisujubama.pdf
    • http://flowerport.market/77785952937hz5wj.pdf
    • https://static.s123-cdn-static.com/uploads/4450424/normal_60043fc815d6a.pdf
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/fifirub.pdf
    • http://tegisuro.22web.org/rod_stewart_the_great_american_songbook_box_set.pdf
    • https://cdn-cms.f-static.net/uploads/4379379/normal_603286cca1cb4.pdf
    • http://agent-ritual495.online/singer_heavy_duty_sewing_machine_4432afnms.pdf
    • http://cafe-cok.ru/72491832677a71db.pdf
    • https://selilanabos.weebly.com/uploads/1/3/4/8/134875664/dofosolijig.pdf
    • http://tekplafond.xyz/luriwiponedegepurararajdz4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jatosug.rf.gd/53513059801.pdf
    • http://datidogebe.epizy.com/3000_basic_english_words.pdf
    • https://uploads.strikinglycdn.com/files/65c317f6-0ce2-4489-95f0-662c6c6a2ddc/letidaja.pdf
    • http://bukijujer.rf.gd/keputudo.pdf
    • https://uploads.strikinglycdn.com/files/a7d775a1-fee3-4a30-870c-61ced720de27/personajes_del_libro_el_secreto_del_caseron_abandonado.pdf
    • https://uploads.strikinglycdn.com/files/6f31b8fa-17ac-402c-90f5-046a2e7e5c8a/16936676865.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_off0000d1df.bin
a32a97a0c37e1c29e22f2168b790611c9ca9671fa5cae938918e2dbc4434dec6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 5332 bytes
font_01_sfnt_off0000e3d0.bin
579a9962333ec34b179137a5e49d69f89d85ef8b78e353bc854f71a3d514e373
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 10612 bytes
font_02_sfnt_off0001080d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 4324 bytes