Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3223acaae68b0d…

MALICIOUS

PDF

73.9 KB Created: 2021-04-01 08:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243852690625c6730e2daf635a4d23a3 SHA-1: d8d110ff52233bebd86a8d4ea4d95bb7e34c2f3a SHA-256: 1c3223acaae68b0d0baba63741cfdcd6d23bb7f634687f37e38b435b86999f2f
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/wix?keyword=solidworks+manual+download+not+working
    • http://vegofejolafud.mygamesonline.org/algae_biofuel_process.pdf
    • http://risubufobi.iblogger.org/voxudewezeru.pdf
    • http://zixudivibudizu.scienceontheweb.net/luwup.pdf
    • http://kekijojovif.sportsontheweb.net/principles_of_lean_manufacturing.pdf
    • https://ninurakabo.weebly.com/uploads/1/3/4/3/134324479/c21e527fb052f.pdf
    • http://tadosuzewamu.medianewsonline.com/apostila_auditor_fiscal_tributrio_municipal.pdf
    • http://sovisuxabubete.22web.org/anualidades_diferidas_y_perpetuas.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/rinagudenitogumokusar.pdf
    • https://wasafigazepez.weebly.com/uploads/1/3/4/5/134586721/24f3caca69c7ea6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nefagolom/visakomefuvifanane.pdf
    • http://guwitus.epizy.com/94649012592.pdf
    • https://ba9dc33f-61c2-415e-8598-c57272458a21.filesusr.com/ugd/c05727_d939b453dff5434ba1ae35f0bbf16cea.pdf?index=true
    • https://s3.amazonaws.com/rojalexipokadaz/61940092730.pdf
    • http://bubezowi.epizy.com/security_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/zosevid/netflix_available_for_list_canada.pdf
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_ae78cce63791441a911aa0cf9a97f200.pdf?index=true
    • https://s3.amazonaws.com/kubafezin/46713778081.pdf
    • http://lebozid.epizy.com/mekepixesogag.pdf
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_436ce206a4a94b039bc019393c5539f9.pdf?index=true
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_5384a766c2e041ea9de274d223aba453.pdf?index=true
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_ad4825ef8bf24e82bf1008db1eadd427.pdf?index=true
    • https://s3.amazonaws.com/dinigugaxej/caulfield_grammar_school_uniform_shop_opening_hours.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_off0000d64d.bin
01f386a766bb995ce2140a00bcca04089a598e3321234ec625a3157e63fe52cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 5168 bytes
font_01_sfnt_off0000e7c5.bin
423f31a74a9df8ea3e4ab0c6b16e0be57e6cae30340f6e144276e6a0905a9534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 10440 bytes
font_02_sfnt_off00010b85.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B85 4324 bytes

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